The thiophane ring was established via reduction of hemiacetal, mesylation of diol, and double SN2 substitution of dimesylate. 经半缩醛的还原,甲磺酸酯化,硫代关环,构建四氢噻吩环;
Hemiacetals and hemiketals are compounds that are derived from aldehydes and ketones respectively. The Greek word hèmi means half. These compounds are formed by formal addition of an alcohol to the carbonyl group.
When the alcohol group is replaced by a second alkoxy group, an acetal or a ketal, respectively, is formed.