Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1257589 | Chinese Chemical Letters | 2011 | 4 Pages |
Abstract
A convenient one-step synthesis of five-membered or six-membered imino-protected cyclic guanidine via an intramolecular ring-closure reaction of alkyl diamine (2a–2g) with 1, 3-diamino-protected methylisothiourea (1a and 1b) was established and investigated. Amino guanidine such as 3-(2-aminoethyl)-1, 2-dibenzyloxycarbonylguanidine (4a) has been proved to be the intermediate of the reaction via utilizing mono-protected diamine as starting material. The intramolecular ring closure of 4a results in 2-benzyloxycarbonyliminoimidazolidine (3a). This new one-step synthesis has advantages of simple condition, easy workup procedure and reasonable yield.
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Physical Sciences and Engineering
Chemistry
Chemistry (General)
Authors
Jian Hai Yuan, Xiao Xiao Yang, Hao Lin, De Xin Wang,