1,5-Rhodium Shift in Rearrangement ofN-Arenesulfonylazetidin-3-ols into Benzosultams
摘要:
Benzosultams are synthesized in an enantiopure form starting from alpha-amino acids through a rhodium-catalyzed rearrangement reaction of N-arenesulfonylazetidin-3-ols. Mechanistically, this reaction involves C-C bond cleavage by beta-carbon elimination and C-H bond cleavage by a 1,5-rhodium shift.
1,5-Rhodium Shift in Rearrangement ofN-Arenesulfonylazetidin-3-ols into Benzosultams
摘要:
Benzosultams are synthesized in an enantiopure form starting from alpha-amino acids through a rhodium-catalyzed rearrangement reaction of N-arenesulfonylazetidin-3-ols. Mechanistically, this reaction involves C-C bond cleavage by beta-carbon elimination and C-H bond cleavage by a 1,5-rhodium shift.
Ring opening of photogenerated azetidinols as a strategy for the synthesis of aminodioxolanes
作者:Henning Maag、Daniel J Lemcke、Johannes M Wahl
DOI:10.3762/bjoc.20.148
日期:——
are identified as promising building blocks for the synthesis of highly substituted dioxolanes. The presented strategy is founded on the build and release of molecular strain and achieves a formal transposition of a methyl group. During light irradiation, 3-phenylazetidinols are forged as reaction intermediates, which readily undergo ringopening upon the addition of electron-deficient ketones or boronic
抽象的 α-氨基苯乙酮被认为是合成高度取代的二氧戊环的有前途的构建单元。所提出的策略建立在分子应变的构建和释放的基础上,并实现了甲基的正式转位。在光照射过程中,3-苯基氮杂环丁醇作为反应中间体形成,在添加缺电子酮或硼酸时很容易发生开环。这一两步过程成功开发的关键是二苯甲基保护基团的识别,该保护基团协调光化学诺里什-杨环化并促进随后的开环。 Beilstein J. Org. Chem. 2024, 20, 1671–1676. doi:10.3762/bjoc.20.148