Oxetanes in Drug Discovery: Structural and Synthetic Insights
作者:Georg Wuitschik、Erick M. Carreira、Björn Wagner、Holger Fischer、Isabelle Parrilla、Franz Schuler、Mark Rogers-Evans、Klaus Müller
DOI:10.1021/jm9018788
日期:2010.4.22
of metabolic degradation in most cases. The incorporation of an oxetane into an aliphatic chain can cause conformational changes favoring synclinal rather than antiplanar arrangements of the chain. Additionally spirocyclic oxetanes (e.g., 2-oxa-6-aza-spiro[3.3]heptane) bear remarkable analogies to commonly used fragments in drugdiscovery, such as morpholine, and are even able to supplant the latter
Asymmetric Desymmetrization of Oxetanes for the Synthesis of Chiral Tetrahydrothiophenes and Tetrahydroselenophenes
作者:Renwei Zhang、Wengang Guo、Meng Duan、K. N. Houk、Jianwei Sun
DOI:10.1002/anie.201910917
日期:2019.12.9
Chiral tetrahydrothiophenes and tetrahydroselenophenes are highly useful structural units. Described here is a new catalytic asymmetric approach for their synthesis. With a suitable chiral Brønsted acid catalyst, an oxetane desymmetrization by a well-positioned internal sulfur or selenium nucleophile proceeded efficiently to generate all-carbon quaternary stereocenters with excellent enantioselectivities
Asymmetric Synthesis of Pyrrolidines via Oxetane Desymmetrization
作者:Renwei Zhang、Meng Sun、Qiaolin Yan、Xingbang Lin、Xin Li、Xin Fang、Herman H. Y. Sung、Ian D. Williams、Jianwei Sun
DOI:10.1021/acs.orglett.2c00564
日期:2022.4.1
Asymmetric synthesis of chiral pyrrolidines bearing an all-carbon quaternary stereocenter in the 3-position remains challenging. Herein we report two efficient protocols by means of oxetane desymmetrization, featuring the use of a readily available tert-butylsulfinamide chiral auxiliary and a catalytic system with chiral phosphoric acid as the source of chirality, respectively.