Monosubstituted γ-lactols 1a−1c, 3a−3c and 4a−4c, as well as disubstituted γ-lactol 5 and the γ-hydroxy-substituted γ-lactone 6, were transformed into disubstituted tetrahydrofuran derivatives by treatment with allyl- and propargylsilanes in the presence of Lewis acids. The diastereoselectivities were moderate to excellent and are interpreted by application of the Felkin−Anh model to cyclic oxocarbenium
Synthesis of an (alkylperoxy)-λ<sup>3</sup>-iodane by the reaction of 1-hydroxy-1λ<sup>3</sup>,2-benziodoxol-3(1H)-one with 1,3-bis(trimethylsilyl)-3-methylbut-1-yne
作者:Masahito Ochiai、Takao Ito、Motoo Shiro
DOI:10.1039/c39930000218
日期:——
The BF3-catalysed reaction of 1-hydroxy-1λ3,2-benziodoxol-3(1H)-one 1 with 1,3-bis(trimethylsilyl)-3-methylbut-1-yne 2b in dichloromethane under nitrogen afforded the peroxy-λ3-iodane, 1-[1,1-dimethyl-3-(trimethylsilyl)-prop-2-ynyl]peroxy-1λ3,2-benziodoxol-3(1H)-one, 5and its structure has been determined by single-crystal X-ray analysis.