Thieme Chemistry Journal Awardees - Where Are They Now? Stereoselective Synthesis of Z-Configured α,β-Unsaturated Macrocyclic Lactones and Diolides by Intramolecular Julia-Kocienski Olefination
作者:Paul Blakemore、Heath Giesbrecht、Brian Knight、Nicole Tanguileg、Christopher Emerson
DOI:10.1055/s-0029-1219185
日期:2010.2
acid with either ω-alkenols or α,ω-diols, followed by ozonolysis or Dess―Martin oxidation as appropriate, underwent intramolecular Julia―Kocienski olefination when treated with DBU. Macrocyclic α,β-unsaturated lactones of between 12- and 19-membered ring sizes were formed successfully using this tactic (24―44% yield, Z/E ≥ 3.5:1); however, diolides were selectively produced from precursors intended
由(苯并噻唑-2-基磺酰基)乙酸与 ω-烯醇或 α,ω-二醇酯化,然后进行臭氧分解或 Dess-Martin 氧化(视情况而定)衍生的 ω-磺醛,在用DBU。使用该策略成功地形成了 12 至 19 元环大小的大环 α,β-不饱和内酯(产率 24-44%,Z/E ≥ 3.5:1);然而,二内酯是由旨在靶向七至九元环内酯的前体选择性生产的(产率 13-70%,ZZ/ZE ≥ 2:1)。