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We are seeking an experienced organic chemist, medicinal chemist, pharmaceutical process-development chemist, or pharmaceutical research consultant with relevant experience in API/process chemistry and preferably familiarity with Etomidate Freebase (CAS 33125-97-2) or closely related pharmaceutical synthesis and process-development work. Project Objective Our team will perform the laboratory work locally in the Philippines. We are looking for an external technical consultant who can recommend the most practical process approach and guide our team through route selection, process development, analytical considerations, troubleshooting, optimisation, and technical documentation. The intended application is R&D, technical training, process development, and knowledge transfer. The target is approximately 200 g of isolated R-(+)-Etomidate freebase, subject to final technical review, laboratory capability, regulatory requirements, and agreed specifications. Scope of Technical Support The selected consultant should be able to support: KSM / starting-material and route selection Evaluation and comparison of practical synthetic routes Process-development and optimisation recommendations Raw-material, reagent, solvent, and consumables planning Laboratory-equipment requirements Analytical strategy and purity / impurity considerations Process monitoring and interpretation of laboratory results Troubleshooting during execution Scale-up considerations relevant to the proposed laboratory scale Laboratory handling and storage considerations Knowledge transfer and technical training Final technical / process documentation Our team will conduct the laboratory execution. The consultant's role is to provide technical direction, documentation, review, troubleshooting, and process-development guidance throughout the agreed scope. Current Laboratory Equipment We currently have access to: Fume hood Standard borosilicate glassware and round-bottom flasks Magnetic stirrer / hot plate and heating mantle Thermometer / temperature probe Ice bath / basic cooling setup Reflux condenser Separatory funnel Vacuum filtration / Büchner setup Analytical balance pH paper Drying oven If additional standard and readily available laboratory equipment is required, please identify it in your proposal. We may be able to procure additional equipment quickly if it is reasonably priced and readily available locally. Preference will be given to process approaches that can be executed mainly with standard organic-chemistry laboratory equipment and that minimize the need for highly specialized or difficult-to-source equipment. What We Want to See in Your Proposal Please provide sufficient technical detail for us to properly evaluate and compare your proposed approach before selecting a consultant. The complete proposed SOP / process procedure must be included as part of your proposal so that our team can review the route, required materials, equipment, process practicality, and overall feasibility before selecting a consultant. Your proposal should include: Your recommended KSM / starting-material strategy The route or route options you consider most practical Approximate number of process stages Comparison of the proposed route with alternative routes you would consider Why your preferred approach is suitable for approximately 200 g scale Complete list of required raw materials, KSMs, reagents, solvents, consumables, and critical materials Equipment required beyond what we already have Analytical/testing requirements Expected major technical challenges or risk points Your proposed process-development and optimisation strategy The complete proposed SOP / process procedure for your recommended route Process controls, monitoring requirements, and important decision points that our team should follow How you would guide our team during laboratory execution How troubleshooting and process adjustments would be handled What support you would provide if the initial execution requires optimisation or adjustment Proposed milestones, timeline, and commercial terms The complete SOP is an important part of our proposal evaluation. We want to review the proposed process before choosing a consultant so that we can compare the practicality, complexity, equipment requirements, material availability, development risk, and overall suitability of each candidate's approach. Applicants who provide only a general description of the route without sufficient process documentation may not provide enough information for us to properly evaluate the proposal. We would also like to understand what additional documentation you can provide as part of the engagement, including the final process/SOP package, analytical information, observations, troubleshooting guidance, optimisation recommendations, and technical-transfer documentation. After reviewing the proposals and confirming the preferred route and procedure, we will select the consultant and proceed with the agreed project scope and technical guidance. Preferred Route Characteristics Our priorities are: Simple and practical execution Minimum number of difficult process steps Readily available KSMs and raw materials Reasonable development and manufacturing cost Low practical risk of batch failure Minimal reliance on specialized equipment Suitable for technical training and future process transfer Reproducible and well documented Candidate Background Preference will be given to candidates with demonstrated experience in: Organic synthesis Pharmaceutical process chemistry Medicinal chemistry API process development CMC / pharmaceutical development Analytical characterization Impurity and purity assessment Process scale-up Technology transfer CRO/CDMO or pharmaceutical manufacturing environments Please briefly describe relevant projects you have completed and the level of hands-on involvement you had in route development, optimisation, scale-up, troubleshooting, and technology transfer. Please submit your complete proposed technical approach, recommended route, complete SOP/process procedure, required materials and equipment, scope of support, deliverables, timeline, and quotation as part of your proposal.
Project ID: 40707272
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13 freelancers are bidding on average $1,119 USD for this job

Hello , I hope you are doing well. I think I can help you with your project! I am a seasoned organic chemist (PhD) with more than 9 years of experience in synthesis and characterization of different organic products. I have more than 13 papers and 7 patents proving my expertise. I also excel in characterization of organic compounds and analysis of results (NMR, MS, FT-IR, UV-Vis) and separation techniques (HPLC, Flash Chromatography, SEC, GC). On the other hand, I am the head of a R&D lab in a biomedical lab as my main job. I can review the project and evaluate your equipment/resources needs and provide educated insights depending on the project and your budget. Do not hesitate to contact me via PM to further discuss the details of your project, deadlines, etc. Have a nice day, Jordi Royes
$1,200 USD in 7 days
5.4
5.4

Hi there, Based on the clarified scope, we propose a structured initial technical assessment focused on evidence review, route-comparison criteria, analytical and laboratory-readiness requirements, technical risk and decision checkpoints, and the documentation framework needed to evaluate next-stage development. The package is designed to give your team a clear, traceable basis for comparing process approaches and identifying the technical inputs, specialist validation and controls required before execution. Any execution-phase chemistry, laboratory troubleshooting or final operational SOP would be scoped separately following this assessment. Best Regards, 8veer
$1,690 USD in 7 days
5.1
5.1

Hi, how are you doing? I went through your project description and I can help you in your project. I am a professional CHEMICAL ENGINEER with strong experience in handling projects across multiple domains of chemical engineering. I have extensive expertise in Aspen Plus and Aspen HYSYS, which allows me to develop accurate process simulations, perform sensitivity analyses, optimize operating conditions, and design efficient process flowsheets for various chemical and petrochemical systems. I have successfully completed 1000+ Projects for multiple regular clients all over the world. My areas of expertise include: Process simulation and modeling (Aspen Plus / Aspen HYSYS) Mass and energy balance calculations Process design and optimization Thermodynamics and reaction engineering Heat exchanger and separation process analysis Distillation, absorption, and extraction processes Chemical process report writing and technical documentation We have good command over REPORT WRITING, we can show you many samples of our previous reports. Let’s discuss further details in the message box.
$1,125 USD in 7 days
3.3
3.3

IF YOU'RE NOT HAPPY, YOU DON'T PAY. I recently completed a similar project involving the synthesis of a complex API, resulting in a 95% purity yield and successful scale-up to 200 grams. I understand you're looking for a consultant to guide your team through the synthesis of Etomidate Freebase. My approach will focus on a clean and practical route selection, ensuring the use of readily available materials and minimizing reliance on specialized equipment. I will provide a comprehensive SOP, addressing analytical strategies, troubleshooting processes, and detailed documentation to facilitate knowledge transfer. I prioritize good planning, clean and maintainable code, clear communication, on-time delivery, and reliable long-term solutions. I am confident my expertise will help achieve your project objectives seamlessly. If this aligns with your project, feel free to reach out to discuss scope and pricing. WORST CASE SCENARIO YOU WALK AWAY WITH A FREE CONSULTATION Regards Ridwaan M
$750 USD in 7 days
0.0
0.0

Hello, I’m Jerry, a senior scientific and pharmaceutical research consultant with a PhD-level background in biological and chemical sciences and experience supporting scientific research, technical evaluation, analytical development, process assessment, documentation, and technical problem-solving. I understand that your team will perform the laboratory work locally in the Philippines while you require an external technical consultant to provide route-selection, process-development, analytical, troubleshooting, optimization, and technology-transfer support for R-(+)-Etomidate freebase. I can support the project as a technical process-development consultant, with particular attention to selecting a practical route that is reproducible, minimizes unnecessary processing steps, uses reasonably accessible materials and standard laboratory infrastructure, and can ultimately be transferred into a controlled laboratory process. I would be happy to discuss the available analytical capabilities, target specifications, starting-material constraints, expected development timeline, and the level of technical support your laboratory team requires. Thanks.
$1,000 USD in 7 days
0.0
0.0

Dear Project Manager, With extensive expertise in organic synthesis and pharmaceutical process development, I can guide your team to safely produce 200 g of isolated R-(+)-Etomidate freebase using your current laboratory setup. Synthetic Strategy & SOP Summary: Route: Enantioselective approach using resolved precursors or classical resolution via L-(+)-tartaric acid to secure the R-(+) configuration. Scale Execution: Process divided into manageable batches (e.g., 4 x 50 g) to fit standard 1-2 L round-bottom flasks and prevent thermal overload. Core Steps: 1) Imidazole-carboxylate coupling under reflux (80^\circ\text{C}); 2) Biphasic work-up and drying over Na_2SO_4; 3) Chiral resolution and mild base (NaHCO_3) neutralization to liberate the pure freebase; 4) Buchner vacuum filtration and controlled drying (40^\circ\text{C}). Equipment Compatibility: Fully compatible with your fume hood, magnetic stirrers, and standard glassware. Quality & Safety: In-process TLC monitoring, precise drop-wise addition for exotherm control, and complete documentation (SOP, batch sheets, and troubleshooting). I am ready to start immediately. Best regards, Chemist/Shaden Ahmed
$1,200 USD in 7 days
0.0
0.0

Caloocan, Philippines
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