On December 28, 2011, Gao, Lizhu; Hwang, Geum-Sook; Ryu, Do Hyun published an article.Reference of tert-Butyl 2-(4-nitrophenyl)acetate The title of the article was Oxazaborolidinium Ion-Catalyzed Cyclopropanation of α-Substituted Acroleins: Enantioselective Synthesis of Cyclopropanes Bearing Two Chiral Quaternary Centers. And the article contained the following:
A catalytic synthetic route to highly functionalized chiral cyclopropane derivatives was developed by Michael-initiated cyclopropanation of α-substituted acroleins with aryl- and alkyl diazoacetates. In the presence of chiral (S)-oxazaborolidinium cation I as a catalyst, the reaction proceeded in high yield (up to 93%) with high to excellent diastereoselectivity (up to 98% de) and enantioselectivity (up to 95% ee). The experimental process involved the reaction of tert-Butyl 2-(4-nitrophenyl)acetate(cas: 29704-38-9).Reference of tert-Butyl 2-(4-nitrophenyl)acetate
The Article related to alpha substituted acrolein diazoacetate chiral oxazaborolidinium catalyst cyclopropanation, cyclopropane stereoselective preparation, Alicyclic Compounds: Cyclopropanes and other aspects.Reference of tert-Butyl 2-(4-nitrophenyl)acetate
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