Stereoselective Nucleophilic Formylation and Cyanation of α-Alkoxy- and α-Aminoaldehydes
作者:Rosario Fernández、Eloísa Martín-Zamora、Carmen Pareja、José M. Lassaletta
DOI:10.1021/jo015711+
日期:2001.7.1
formaldehyde N,N-dialkylhydrazones to carbohydrate-derived alpha-alkoxyaldehydes takes place under neutral conditions and in the absence of catalysts or promoters to afford the corresponding alpha-hydroxyhydrazones in good to excellent yields and with highly anti diastereoselectivities. Subsequent transformations of the hydrazono group into aldehydes and nitriles following known procedures provide a new entry
在中性条件下,在没有催化剂或促进剂的情况下,将甲醛N,N-二烷基hydr自然地自发1,2-甲醛加成至碳水化合物衍生的α-烷氧基醛中,从而以良好或优异的收率和高度抗性提供相应的α-羟基hydr非对映选择性。遵循已知方法,随后azo基向醛和腈的转化分别为碳水化合物的同源化和氰醇的合成提供了新的途径。另外,亚甲基氨基吡咯烷与来自天然氨基酸的N-Boc保护的α-氨基醛反应可在相同条件下有效提供相应的加合物。从这些加合物中