In the presence of MS 4 Å in DMSO (dimethyl sulfoxide), Henry reaction with various carbonyl compounds and nitroalkanes proceeded smoothly to give the corresponding β-nitroalcohol without a base catalyst. Moreover, 1,4-additon of nitroalkane to α,β-unsaturated ketones was also performed in DMSO.
在 DMSO(二甲基亚砜)中加入 MS 4 Å 的情况下,各种羰基化合物与硝基烷烃的 Henry 反应顺利进行,无需碱催化剂即可得到相应的 β-硝基醇。此外,硝基烷烃对 α,β-不饱和酮的 1,4-加成反应也在 DMSO 中得以实现。
Organocatalytic Nitroaldol Reaction Associated with Deuterium-Labeling
A deuterium‐labelingreaction of nitroalkanes in deuterium oxide and the subsequent nitroaldol reaction have been accomplished under basic and organocatalytic conditions to provide the deuterium‐labeled β‐nitroalcohols in high yields and high deuterium contents. β‐Deuterated β‐nitroalcohols could be smoothly obtained from the reaction of nitroalkanes and various electrophiles using the easily‐removal
S-Benzyl isothiouronium chloride as a recoverable organocatalyst for the reduction of conjugated nitroalkenes with Hantzsch ester
作者:Quynh Pham Bao Nguyen、Jae Nyoung Kim、Taek Hyeon Kim
DOI:10.1016/j.tet.2012.05.104
日期:2012.8
The reduction of conjugated nitroalkenes into nitroalkanes with Hantzsch ester using S-benzyl isothiouronium chloride as a recoverableorganocatalyst was successfully accomplished with high yield and excellent chemoselectivity.