Facile synthesis of allylic nitro compounds by N,N-dimethylethylenediamine-catalyzed condensation of aliphatic and alicyclic ketones with primary nitroalkanes
Facile synthesis of allylic nitro compounds by N,N-dimethylethylenediamine-catalyzed condensation of aliphatic and alicyclic ketones with primary nitroalkanes
Organocatalyzed Enantioselective
Synthesis of Nitroalkanes Bearing All-Carbon Quaternary
Stereogenic Centers through Conjugate Addition of Acetone Cyanohydrin
作者:Mariafrancesca Fochi、Alfredo Ricci、Luca Bernardi、Francesco Fini
DOI:10.1055/s-2008-1078496
日期:——
The first organocatalyzed phase-transfer enantioselective conjugateaddition of cyanide ion derived from acetone cyanohydrin to β,β'-disubstituted nitroolefins is reported. The reaction leads to the efficient formation of nitroalkanes bearing an all-carbonquaternarystereogeniccenter in up to 72% ee.
报道了第一个有机催化相转移对映选择性共轭加成从丙酮氰醇衍生的氰化物离子到 β,β'-二取代硝基烯烃。该反应导致有效形成具有高达 72% ee 的全碳四元立体中心的硝基烷烃。
Allylic Nitro Compounds as Nitrite Donors
作者:Harinath Chakrapani、Michael J. Gorczynski、S. Bruce King
DOI:10.1021/ja066011v
日期:2006.12.1
Allylic nitrocompounds were synthesized and evaluated as organic sources of nitrite and nitric oxide. Unactivated allylic nitrocompounds do not spontaneously release nitrite and nucleophile promoted nitrite release is slow. However, 2-(nitromethyl)-cyclohex-1-ene-3-one spontaneously dissociates in buffer (pH = 7.4) to release nitrite with a kobs = 1.6 x 10(-5) s(-1). In the presence of L-cysteine