Reactions of formaldehyde with methylene compounds. Part I. Products from acetoacetic esters
作者:T. B. H. McMurry、M. T. Richardson
DOI:10.1039/j39670001804
日期:——
the ethyl and methyl esters of 2,2-di(hydroxymethyl)acetoacetic acid (I) and 2,6-dihydroxy-2,6-dimethyl-3,7-dioxabicyclo[3,3,1]nonane-1,5-dicarboxylic acid (X). The esters of the former, though impure, afford normal diacetates with acetic anhydride–pyridine, but with acetyl chloride the ethyl ester gives a 1,3-dioxan (Va), and with ammonia, a dihydropyridine (VIa). With piperidine, both esters (I)
我们制备了2,2-二(羟甲基)乙酰乙酸(I)和2,6-二羟基-2,6-二甲基-3,7-二氧杂双环[3,3,1]壬烷-1的乙酯和甲酯,5-二羧酸(X)。前者的酯虽然不纯,但能与乙酸酐-吡啶制得普通的二乙酸酯,而与乙酰氯制得的乙酯可制得1,3-二恶烷(Va),与氨制得的是二氢吡啶(VIa)。对于哌啶,两种酯(I)通过C → O-乙酰基转移反应得到不饱和酯(VII)。甲基酯(VIIb)也已经从甲基酯(Xb)与哌啶和多聚甲醛获得。