Abstract Treatment of tertiary β-nitro alcohols I, obtained by addition of lithium α-lithionitronates to ketones, with acetic anhydride followed by 1 equivalent of potassium methoxide or t-butoxide, according to the nature of R2, gives α-nitroalkenes III in good yields.
P(RNCH<sub>2</sub>CH<sub>2</sub>)<sub>3</sub>N: An Efficient Promoter for the Nitroaldol (Henry) Reaction
作者:Philip B. Kisanga、John G. Verkade
DOI:10.1021/jo9818733
日期:1999.6.1
The use of catalytic amounts of the proazaphosphatranes P(MeNCH2CH2)(3)N, P(i-PrNCH2CH2)(3)N and P(HNCH2CN2)(i-PrNCH2CH2)(2)N as nonionic bases in the reaction of nitroalkanes with carbonyl compounds is reported. The reaction proceeds at room temperature in the presence of 2.2 equiv of magnesium sulfate to produce the corresponding beta-nitroalkanols in generally superior yields. Aldehydes react quantitatively in 5-60 min, whereas ketones require up to 3 h to react with nitromethane and up to 7 h for the reaction of ketones with higher nitroalkanes.
Koslow et al., Metodiceskij sbornik, 1957, # 23, p. 148,154
作者:Koslow et al.
DOI:——
日期:——
Preparation of cycloalkanones
申请人:UNIV MICHIGAN
公开号:US02846474A1
公开(公告)日:1958-08-05
126. The effect of the nitro-group in three-carbon tautomerism