中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
2-(2-氯乙氧基)苯甲醛 | 2-(2-chloroethoxy)benzaldehyde | 54373-14-7 | C9H9ClO2 | 184.622 |
—— | (2-(2-chloroethoxy)phenyl)methanol | 98995-33-6 | C9H11ClO2 | 186.638 |
—— | 2-[o-(hydroxymethyl)phenoxy]ethanol | 98954-44-0 | C9H12O3 | 168.192 |
A method has been developed for the synthesis of a new heterocyclic system III. When 2-β-chloroethoxybenzyl chloride (XI) was heated with thiourea in alcohol solution, S-(2-β-chloroethoxybenzyl)isothiuronium chloride (XII) was formed which on cleavage with aqueous alkali in high dilution yielded 2,3-dihydrobenzo(f)-1,4-oxathiepin (III). Derivatives of III with substituents such as methyl, t-butyl, chlorine, and nitro in the 7 and 9 positions were prepared in high yields from the corresponding substituted 2-β-chloroethoxybenzyl chlorides. The presence of substituents in the position ortho to the chloroethoxy group of XII had no retarding effect on the cyclization to XIV.