Journal
ORGANIC LETTERS
Volume 22, Issue 3, Pages 920-923Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.9b04478
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Funding
- NSF of China [21801118]
- Science, Technology, and Innovation Commission of Shenzhen [JCYJ20170817104350391, KQTD20150717103157174]
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A straightforward method to prepare 1,5-benzothiazepines was reported. Catalyzed by a Rh/Zhaophos complex, unsaturated cyclic NH lactams with a medium-size ring were hydrogenated smoothly, giving remarkably high enantioselectivities. The sulfur atom in the substrates did not bring an inhibition which was observed with commercially available bisphosphine ligands. This method was successfully applied in the scale-up synthesis of (R)-(-)-thiazesim.
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