Efficient Synthesis of Pyrimido[1,2-c] [1,3]benzothiazin-6-imines and Related Tricyclic Heterocycles by SNAr-Type C−S, C−N, or C−O Bond Formation with Heterocumulenes
摘要:
A simple and practical synthetic method of pyrimido[1,2-c]-[1,3]benzothiazin-6-imines and related tricyclic heterocycles has been developed. Treatment of 2-(2-haloaryl)-tetrahydropyrimidines with NaH and a heterocumulene such as carbon disulfide, isothiocyanates, and isocyanates in DMF provides the desired cyclization products through a regioselective SNAr-type reaction. This method provides direct access to PD 404182 and related compounds.
Efficient Synthesis of Pyrimido[1,2-<i>c</i>] [1,3]benzothiazin-6-imines and Related Tricyclic Heterocycles by S<sub>N</sub>Ar-Type C−S, C−N, or C−O Bond Formation with Heterocumulenes
A simple and practical synthetic method of pyrimido[1,2-c]-[1,3]benzothiazin-6-imines and related tricyclic heterocycles has been developed. Treatment of 2-(2-haloaryl)-tetrahydropyrimidines with NaH and a heterocumulene such as carbon disulfide, isothiocyanates, and isocyanates in DMF provides the desired cyclization products through a regioselective SNAr-type reaction. This method provides direct access to PD 404182 and related compounds.
Concise synthesis and anti-HIV activity of pyrimido[1,2-c][1,3]benzothiazin-6-imines and related tricyclic heterocycles
and simian immunodeficiency virus. Using facile synthetic approaches that we developed for the synthesis of pyrimido[1,2-c][1,3]benzothiazin-6-imines and related tricyclic derivatives, the parallel structural optimizations of the central 1,3-thiazin-2-imine core, the benzene part, and the cyclicamidinepart of PD 404182 were investigated. Replacement of the 6-6-6 pyrimido[1,2-c][1,3]benzothiazin-6-imine
3,4-二氢-2 H,6 H-嘧啶[1,2- c ] [1,3]苯并噻嗪-6-亚胺(PD 404182)是对多种病毒(包括HCV,HIV和猿猴免疫缺陷病毒)具有活性的杀病毒杂环化合物。使用我们开发的用于合成嘧啶并[1,2- c ] [1,3]苯并噻嗪-6-亚胺和相关三环衍生物的简便合成方法,对中心1,3-噻嗪-2-亚胺的平行结构进行了优化研究了PD 404182的核,苯部分和环am部分。取代6-6-6嘧啶[1,2- c具有5-6-6或6-6-5衍生物的] [1,3]苯并噻嗪-6-亚胺骨架导致抗HIV活性显着下降,并在9-或10-位引入了疏水基团提高了效能。此外,我们证明了PD 404182衍生物在病毒感染的早期发挥了抗HIV的作用。