AbstractA one-potsynthesis of alkyl 3,4-dihydro-4-oxo-2H-1,3-thiazine-6-carboxylates from dialkyl acetylenedicarboxylates and N,N′-dialkylthioureas in the presence of triphenylphosphine (20 mol%) is described. Graphical Abstract
摘要在三苯基膦(20摩尔%)存在下,由乙炔基二羧酸二烷基酯和N,N'-二烷基硫脲形成的一锅法合成3,4-二氢-4-氧代-2 H -1,3-噻嗪-6-羧酸烷基酯是描述。 图形概要