A Facile, General Approach to the Synthesis of Electrophilic Acetone Equivalents
摘要:
The facile, high-yielding, yet general synthesis of electrophilic chloroacetone equivalents 11a-f is described. The enol ethers are assembled in three steps starting with trichloride 29 in overall yields of 57-93%. Nucleophilic displacement of the chloromethyl chlorine with a range of organometallic reagents generates dichlorides 30 in yields of 58-99%, which can be dehydrohalogenated with t-BuOK/THF in yields of 87-99% to produce enol ethers 31. Conversion of the allyl chlorides 31 to the corresponding allyl iodides 11 with 72-99% yield completes the synthetic sequence. The entire sequence can be performed in less than 48 h on a >50 mmol scale.
Regioselective Addition of Organic Chlorides to Epoxides in the Presence of Quaternary Ammonium Chloride
作者:Xue-Ping Gu、Isao Ikeda、Mitsuo Okahara
DOI:10.1246/bcsj.60.397
日期:1987.1
By a reaction of epoxides with organic chlorides in the presence of dodecyltrimethylammonium chloride as a catalyst, a series of 2-substituted 1-(chloromethyl)ethyl ethers were synthesized regioselectively in high yields under mild conditions.
A process for the preparation of 1-aryloxy-3-aminopropane derivatives and acid addition salts thereof and such products per se, the process comprising ring opening of tertiary azetidinol derivatives. They possess .beta.-adrenegic block activity and an activity of controlling secretion of gastric juice and are therefore useful antiulcerative medicines for peptic ulcer and duodenal ulcer.
Process for production of 1-aryloxy-aminopropane derivatives
申请人:Teikoku Hormone Mfg. Co. Ltd.
公开号:US04360464A1
公开(公告)日:1982-11-23
A process for the preparation of 1-aryloxy-3-aminopropane derivatives and acid addition salts thereof and such products per se the process comprising ring opening of tertiary azetidinol derivatives. They possess .beta.-adrenergic blocking activity and an activity of controlling secretion of gastric juice and are therefore useful antiulcerative medicines for peptic ulcer and duodenal ulcer.