作者:Keisuke Yoshida、Atsushi Hirata、Hisashi Hashimoto、Ayumi Imayoshi、Yoshihiro Ueda、Takumi Furuta、Takeo Kawabata
DOI:10.1016/j.tetlet.2017.01.039
日期:2017.3
Predominant monoacylation of 1,n-linear disulfonamides took place in the presence of pyrrolidinopyridine-type organocatalysts when the chain length of the linear disulfonamides was n = 3, 4, or 5 (monoacylate/diacylate = up to 44). The chemoselectivity of the competitive acylation between N,N′-ditosyl-1,5-pentanediamine (n = 5) and N,N′-ditosyl-1,3-propanediamine (n = 3) was found to be 36, favoring
的1主要单酰化,Ñ -线性disulfonamides发生在吡咯烷基型有机催化剂的存在下,当线性disulfonamides的链长度为n = 3,4或5(monoacylate /二酰基=高达44)。N,N'-二甲苯基-1,5-戊二胺(n = 5)和N,N'-二甲苯基-1,3-丙二胺(n = 3)之间的竞争性酰化反应的化学选择性为36,有利于前基板。N,N'-二甲苯基-1,5-戊二胺(n = 5)与N,N之间的竞争性酰化作用仅区分了一个碳原子的不同链长在有机催化剂存在下,相对酰化率为16的'-二甲苯基-1,4-丁二胺(n = 4)。