Journal
ORGANIC LETTERS
Volume 22, Issue 16, Pages 6262-6266Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.0c01943
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Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [141855/2015-0]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2016/12096-0, 2019/13104-5]
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This work describes the total synthesis of raputindole A (1) through a convergent approach that features (1) an iridium-catalyzed cyclization to assemble the tricyclic core of the northern part, (2) enzymatic resolution to secure the preparation of an enantiomerically pure benzylic alcohol intermediate, and (3) the installation of the isobutenyl side chain via methallylation of the corresponding benzylic carbocation and coupling of the northern and southern parts via the Heck reaction. (+)-Raputindole A (1) was prepared in 10 steps (longest linear sequence) in 3.3% overall yield.
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