Chiral phosphoric acid catalyzed enantioselective addition of thiols to in situ generated ketimines: Synthesis of N , S -ketals
作者:Rajshekhar A. Unhale、Nagaraju Molleti、Nirmal K. Rana、Sivasankaran Dhanasekaran、Subhrajyoti Bhandary、Vinod K. Singh
DOI:10.1016/j.tetlet.2016.11.114
日期:2017.1
The chiral Brønsted acid catalyzed enantioselective 1,2-addition of thiols to in situgenerated ketimines, derived from 3-hydroxyisoindolinones, has been studied. The protocol provides a variety of isoindolinone-derived N,S-ketals in up to 98% yield and up to 99% enantioselectivity. The products have been converted to a known non-nucleoside HIV-1 reverse transcriptase inhibitor and a 1,3-thiazine derivative