Synthesis 2023; 55(20): 3349-3363
DOI: 10.1055/a-2105-2774
paper

Scalable, Stereocontrolled, Total Synthesis of Carolacton

Chuan-Cai Bian
,
Yong-Qiang Li
,
Hao-ran Yang
,
Xiao-Ming Yu
This project received financial support from CAMS Innovation Fund for Medical Sciences (CIFMS 2016-I2M-3-009 and CIFMS 2017-I2M-3-011) and the Natural Science Foundation of China (21272279)


Abstract

A route for the scalable, stereocontrolled, total synthesis of carolacton is presented starting from commercially available S-Roche ester, d-ribose, and a known allylic alcohol. Key transformations in the total synthesis include a [3,3]-Claisen rearrangement, Sharpless asymmetric epoxidation–methyl ring-opening, or Leighton asymmetric crotylation, Evans aldol–reductive deoxygenation, and ring closing metathesis (RCM). The total synthesis of carolacton (151 mg isolated, 9.2% overall yield) was completed in 23 linear steps. Additionally, 56 mg of the carolacton C15–C16 cis-olefin isomer was obtained.

Supporting Information



Publication History

Received: 04 April 2023

Accepted after revision: 02 June 2023

Accepted Manuscript online:
02 June 2023

Article published online:
07 August 2023

© 2023. Thieme. All rights reserved

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Rüdigerstraße 14, 70469 Stuttgart, Germany

 
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