1202518-88-4Relevant articles and documents
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
Mizuhara, Tsukasa,Oishi, Shinya,Fujii, Nobutaka,Ohno, Hiroaki
supporting information; experimental part, p. 265 - 268 (2010/04/06)
(Chemical Equation Presented) 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 S NAr-type reaction. This method provides direct access to PD 404182 and related compounds.