Synthesis 2022; 54(10): 2473-2479
DOI: 10.1055/s-0041-1737844
paper

Stereoselective Total Synthesis of (+)-Casuarine via a Functionalized Pyrrolidine

In-Soo Myeong
a   School of Pharmacy, Sungkyunkwan University, Seobu-ro 2066, Suwon-si, Gyeonggi-do 16419, Republic of Korea
,
Won-Hun Ham
a   School of Pharmacy, Sungkyunkwan University, Seobu-ro 2066, Suwon-si, Gyeonggi-do 16419, Republic of Korea
b   Yonsung Fine Chemicals Co., Ltd., Sujeong-ro 207, Jangan-myeon, Hwaseong-si, Gyeonggi-do 18581, Republic of Korea
› Institutsangaben
This work was supported by Yonsung Fine Chemicals Co., Ltd.


Abstract

The stereoselective total synthesis of (+)-casuarine has been achieved via a functionalized pyrrolidine obtained from a chiral 1,3-oxazine. The synthetic strategy includes a stereoselective dihydroxylation reaction using osmium tetroxide and stereoselective Grignard-type vinyl addition reaction as the key steps to generate the two new stereocenters. The dihydroxylation catalyzed by osmium tetroxide formed anti-amino alcohol, and the vinyl addition formed syn-alcohol. (+)-Casuarine was prepared from the functionalized pyrrolidine over 11 steps in an overall yield of 16%.

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Eingereicht: 25. November 2021

Angenommen nach Revision: 20. Dezember 2021

Artikel online veröffentlicht:
14. Februar 2022

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