The synthesis of fused cyclic dihydrothiopyrans 2a-c from dihydrothiopyranones 1a-c and thiopyrans 2d-f from thiopyranones 1d-f by catalytic reduction over molybdenum(VI) sulfide (MoS3) has been studied. The hydrogenolysis of the carbonyl group of 1a-f over MoS3 catalyst proceeded selectively to give the corresponding 2a-f in high yields. Neither alcohols nor olefins were not detected in the products
稠环dihydrothiopyrans的合成2a-c中从dihydrothiopyranones 1A-1C和
噻喃2D-F从thiopyranones 1d的-F通过催化还原
钼(VI)
硫化物(MOS 3)进行了研究。1a-f的羰基在MOS 3催化剂上的氢解选择性进行,以高收率得到相应的2a-f。产品中均未检测到醇或烯烃。该方法也成功地用于由二氢
吡喃酮1h和
吡喃酮1g合成二氢
吡喃2h和
吡喃2g 。