An efficient green chemical approach for the synthesis of structurally diverse spiroheterocycles with fused heterosystems
作者:Anand Kumar Arya、Mahendra Kumar
DOI:10.1039/c1gc00008j
日期:——
Structurally diverse spiroheterocycles with fused heterosystems; spiro[benzothiazolo[2,3-b] chromeno[3,4-e]pyrimidine-7,3′-indoline]-2′,6-diones, spiro[benzothiazolo[2,3-b]pyrimido[5,4-e]pyrimidine-5,3′-indoline]-2,2′,4-triones, spiro[benzothiazolo[2,3-b]quinazolin-5,3′-indoline]-2′,4-diones and spiro[benzothiazolo[2,3-b]pyrano[3,4-e]pyrimidine-5,3′-indoline]-2′,4-diones incorporating medicinally privileged heterosystems have been synthesized by an environmentally benign, efficient and convenient synthesis involving the sulfamic acid-catalyzed multicomponent domino reaction of 2-aminobenzothiazoles with isatin and cyclic 1,3-diketones in an aqueous medium.
结构多样的具有融合杂系统的螺杂环;螺[苯并噻唑并[2,3-b]色烯并[3,4-e]嘧啶-7,3′-吲哚啉]-2′,6-二酮、螺[苯并噻唑并[2,3-b]嘧啶并[5,4-e]嘧啶-5,3′-吲哚啉]-2、2′,4-三酮、螺[苯并噻唑并[2,3-b]喹唑啉-5,3′-吲哚啉]-2′,4-二酮和螺[苯并噻唑并[2,3-b]吡喃并[3,4-e]嘧啶-5,3′-吲哚啉]-2′、通过氨基磺酸催化的多组分多米诺反应,2-氨基苯并噻唑与异靛红和环状 1,3-二酮在水介质中合成了具有药用价值的 4-二酮杂环。