Syntheses of 15N-enriched polyamines.
作者:KEIJIRO SAMEJIMA、YASUKO TAKEDA、MASAKO KAWASE、MASASHI OKADA、YOSHIMASA KYOGOKU
DOI:10.1248/cpb.32.3428
日期:——
A total synthesis of polyamines was developed using potassium phthalimide as a sole nitrogen source. 15N-Enriched phthalimide was prepared almost quantitatively from 15N-enriched ammonium sulfate by a modified method. Key compounds for the synthesis of 15N-enriched spermidine and spermine were 15N-enriched putrescine (I), N-(3-bromopropyl)-phthalimide (II), N-(4-bromobutyl) phthalimide (III), and benzylamine, which were easily prepared in high yields from potassium 15N-enriched phthalimide. Spermidine was synthesized by two alternative methods involving an alkylation of monobenzyloxycarbonyl putrescine with II and a stepwise alkylation of benzylamine with II and III in the presence of KF-Celite. The lattter method allowed the preparation of all seven kinds of various 15N-enriched spermidines with combinations of the three reagents containing 15N or 14N. Spermine was similarly synthesized by an alkylation of N, N'-dibenzylputrescine with II. In these methods, the alkylation using KF-Celite was extremely useful for the synthesis of spermidine and spermine. The present methods were also used to synthesize various other polyamines in high yields.
使用邻苯二甲酰亚胺钾作为唯一氮源开发了多胺的全合成。通过改进的方法,由富 15N 硫酸铵几乎定量地制备了 15N 富集邻苯二甲酰亚胺。合成 15N 富集亚精胺和精胺的关键化合物是 15N 富集腐胺 (I)、N-(3-溴丙基)-邻苯二甲酰亚胺 (II)、N-(4-溴丁基) 邻苯二甲酰亚胺 (III) 和苯甲胺,其中可以很容易地从富含 15N 的邻苯二甲酰亚胺钾中以高产率制备。亚精胺通过两种替代方法合成,包括在 KF-硅藻土存在下用 II 对单苄氧基羰基腐胺进行烷基化,以及用 II 和 III 对苄胺进行逐步烷基化。后一种方法允许通过含有15N或14N的三种试剂的组合来制备所有七种不同的富含15N的亚精胺。类似地,通过用II烷基化N,N'-二苄基腐胺来合成精胺。在这些方法中,使用 KF-Celite 进行烷基化对于亚精胺和精胺的合成非常有用。本方法还用于高产率合成各种其他多胺。