Regioselective Synthesis of
2-(Arylthio)benzoates by the First Catalytic [3+3] Cyclocondensations
of 3-(Arylthio)-1-(trimethylsilyloxy)-1,3-butadienes with 1,1,3,3-Tetramethoxypropane
2-(Arylthio)benzoates were regioselectively prepared by the first catalytic [3+3] cyclizations of 3-(arylthio)-1-(trimethylsilyloxy)-1,3-butadienes with 1,1,3,3-tetramethoxypropane.
Regioselective Synthesis of 2-(Aryloxythio)benzoates by the First [3+3] Cyclizations of 3-Aryloxythio-1-silyloxybuta-1,3-dienes with 3-Alkoxy-2-en-1-ones
Functionalized 2-(aryloxythio)benzoates were regioselectively prepared by the first [3+3] cyclizations of 3-aryloxythio-1-trimethylsilyloxybuta-1,3-dienes with 3-alkoxy-2-en-1-ones. cyclizations - diaryl sulfides - regioselectivity - pyridines - silyl enol ethers
Cyclopropanation of active methylene compounds with β-alkoxycarbonyl vinylsulfonium salts
作者:Shenquan Guo、Niuniu Zhang、Xiangzheng Tang、Zhifeng Mao、Xuejing Zhang、Ming Yan、Yining Xuan
DOI:10.1016/j.cclet.2018.08.021
日期:2019.2
Abstract An efficient synthesis of β-alkoxycarbonyl vinylsulfonium salts had been developed. Their reaction with indene-1,3-diones and other activemethylenecompounds provided cyclopropane carboxylates in good yields. A tentative reaction mechanism was proposed.
Anionic Amino-Cope Rearrangement Cascade Synthesis of 2,4-Substituted Benzoate Esters from Acyclic Building Blocks
作者:M. Haziq Qureshi、Jon T. Njardarson
DOI:10.1021/acs.orglett.2c03134
日期:2022.11.4
We report a new anionic cascade for assembling 2,4-substituted benzoate esters in one pot from racemic β-fluoro-substituted conjugated tert-butylsulfinyl imines and 3-substituted methyl 2-butenoates. Dienolate formation triggers a Mannich addition followed by an amino-Cope like rearrangement, which results in immediate elimination of fluoride by a lithiated enamine. The newly formed 1,4-diene intermediate
Synthesis of Methyl 2-arylthio-5 -aryldiazenylbenzoates by Formal [3+3]Cyclizations of 3-arylthio-1-silyloxy-1,3-butadienes with 2-aryldiazenyl-3-silyloxy-2-en-1-ones
作者:Muhammad Imran、Inam Iqbal、Zharylkasyn A. Abilov、Peter Langer
DOI:10.1080/10426507.2013.818999
日期:2014.1.1
The formal [3+3]cyclization of 3-arylthio-1-silyloxy-1,3-butadienes with 2-aryldiazenyl-3-silyloxy-2-en-1-ones afforded a variety of 2-arylthio-5-aryldiazenylbenzoates.