CYCLIZATION REACTIONS OF 2-ISOTHIOCYANATOPHENYL KETONES GIVING 4-HYDROXYQUINOLINE-2(1H)-THIONES AND 4-ALKYLIDENE-1,4-DIHYDRO-3,1-BENZOXAZINE-2-THIONES

[摘要]：2-Isothiocyanatophenyl methyl ketones, generated in situ by treatment of 2-isocyanophenyl methyl ketones with sulfur in the presence of a catalytic amount of selenium and excess triethylamine, underwent electrocyclic reaction (ECR) via their enolate forms to give 4-hydroxyquinoline-2(1H)-thiones. The reaction products from ethyl 2-isothiocyanatophenyl ketones generated in situ from the corresponding isocyanides under similar conditions proved to be the ECR products, 4-hydroxy-3-methylquinoline-2(1H)-thiones and/or the ionic cyclization products, 4-ethylidene-1,4-dihydro-3,1-benzoxazine-2-thiones.

[全文传递流程]：

一般上传文献全文的时限在1个工作日内