反应详情

The procedure of Example 1(a) is followed using 2,3-butanedithiol and 3-chloro-2-butanone to give 2,3-dihydro-2,3,5,6-tetramethyl-1,4-dithiin, as a colorless liquid, b.p. 58°-60°0.02 mm, yield 60%. NMR 1.34 (6d), 1.87 (6s), 2.7-3.2 (2m) (CDCl3). IR, 2950, 1600, 1435, 1365, 1150, 1060, 760, 680.