Han Zhang, Binfeng Li, Jin Yang, Changchun Xu, Rafaela Carmona, Jason Zhu, Bilal Hoblos and Steven Wisniewski*,
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Development of a Scalable Alkylation via a Protection/Deprotection Sequence for BMT-773752: Key Intermediate in the Synthetic Route to Repotrectinib
The development of a practical and scalable synthetic route to BMT-773752-02, a key starting material for repotrectinib, is described. The original sequence exhibited various limitations such as use of pyrophoric organolithium reagents, low yield, poor diastereoselectivity, and lengthy workup/purification procedures, which were overcome by development of a new route. A salt screening was conducted to improve the physical properties of the title compound. The scalability of the newly designed synthetic strategy has been demonstrated on multihundred-kilogram scale production to afford greater than a metric ton of this intermediate.
期刊介绍:
The journal Organic Process Research & Development serves as a communication tool between industrial chemists and chemists working in universities and research institutes. As such, it reports original work from the broad field of industrial process chemistry but also presents academic results that are relevant, or potentially relevant, to industrial applications. Process chemistry is the science that enables the safe, environmentally benign and ultimately economical manufacturing of organic compounds that are required in larger amounts to help address the needs of society. Consequently, the Journal encompasses every aspect of organic chemistry, including all aspects of catalysis, synthetic methodology development and synthetic strategy exploration, but also includes aspects from analytical and solid-state chemistry and chemical engineering, such as work-up tools,process safety, or flow-chemistry. The goal of development and optimization of chemical reactions and processes is their transfer to a larger scale; original work describing such studies and the actual implementation on scale is highly relevant to the journal. However, studies on new developments from either industry, research institutes or academia that have not yet been demonstrated on scale, but where an industrial utility can be expected and where the study has addressed important prerequisites for a scale-up and has given confidence into the reliability and practicality of the chemistry, also serve the mission of OPR&D as a communication tool between the different contributors to the field.