Studies Toward Elucidating the Stereochemical Structure of Iriomoteolide 1a
作者:Jiong Yang、Jinhua Huang
DOI:10.1055/s-0031-1290357
日期:2012.3
A diastereomer of iriomoteolide 1a has been synthesized as part of our effort to identify the so far unknown stereochemical structure of the natural product. The synthetic route features a lithium acetylide-chloroformate coupling, the ring-closing metathesis to form the macrocyclic diolide, and a SmI2-mediated intramolecular reductive allylation for formation of the cyclic hemiketal.
Enantioselective Synthesis of a Diastereomer of Iriomoteolide-1a. What Is the Correct Structure of the Natural Product?
作者:Lijing Fang、Jiong Yang、Fei Yang
DOI:10.1021/ol1011423
日期:2010.7.16
An enantioselective approach to a diastereomer of iriomoteolide-1a is described. Highlighted is a Sml(2)-mediated intramolecular reductive cyclization approach to complex cyclic hemiketals. An acetylide-chloroformate coupling strategy is also featured. Our results show that the structures of iriomoteolide-1a-1c require careful reassessment.
Synthesis of enantiopure isoprene epoxides from (S)-lactic acid via ‘dispoke’ intermediates
作者:Daping Zhang、Christine Bleasdale、Bernard T. Golding、William P. Watson
DOI:10.1039/b002133o
日期:——
‘Dispoke protected lactate’ derived from (S)-lactic acid was converted into the enantiopure isoprene epoxides (S)-2-ethenyl-2-methyloxirane and (2R,2′S)-2-methylbioxirane.