Synthesis of 1,4-diazepin-5-ones under microwave irradiation and their reduction products
摘要:
A new efficient access to 1,4-diazepane derivatives is described via a microwave assisted synthesis of 7-substituted-1,4-diazepin-5-ones, which proceeds rapidly in good yields. Catalytic reduction gave 1,4-diazepan-5-ones and 1,4-diazepanes whereas a ring opening was observed by hydride reduction when a phenyl group occupies the N-benzylic position. (c) 2007 Elsevier Ltd. All rights reserved.
Abstract Eight process-related impurities in the synthesis of suvorexant were identified, while six of them were described for the first time. In order to get the references for the process optimization and quality control of API, the eight compounds were synthesized. According to the possible formation pathways, a modified synthesis and the strategy for impurity control in the corresponding reactions
A new efficient access to 1,4-diazepane derivatives is described via a microwave assisted synthesis of 7-substituted-1,4-diazepin-5-ones, which proceeds rapidly in good yields. Catalytic reduction gave 1,4-diazepan-5-ones and 1,4-diazepanes whereas a ring opening was observed by hydride reduction when a phenyl group occupies the N-benzylic position. (c) 2007 Elsevier Ltd. All rights reserved.