Reactions of Heterocumulenes with Organometallic Reagents: VIII. Reactions of Carbanions Derived from Alkoxy- and Alkylsulfanylethenes with Isothiocyanates-A Convenient Route to 2-Propenethioamides, 1-Methylsulfanyl-2-propen-1-imines, and Benzothiazoles
摘要:
Metalated alkoxy- and alkylsulfanylethenes readily add to isothiocyanates; the subsequent hydrolysis or alkylation of the adducts leads to formation of 2-propenethioamides or 1-methylsulfanyl-2- propen-1-imines (as mixtures of syn and anti isomers) in 74-100% yield. The reaction of metalated alkoxyethenes with 2-fluorophenyl isothiocyanate opens the way to new benzothiazole derivatives. Hydrolysis of the latter provides a simple method for the preparation of 2-benzothiazolyl ketones.
Reactions of Heterocumulenes with Organometallic Reagents: VIII. Reactions of Carbanions Derived from Alkoxy- and Alkylsulfanylethenes with Isothiocyanates-A Convenient Route to 2-Propenethioamides, 1-Methylsulfanyl-2-propen-1-imines, and Benzothiazoles
作者:N. A. Nedolya、N. I. Shlyakhtina、G. I. Sarapulova、L. Brandsma
DOI:10.1023/b:rujo.0000034907.84291.94
日期:2004.1
Metalated alkoxy- and alkylsulfanylethenes readily add to isothiocyanates; the subsequent hydrolysis or alkylation of the adducts leads to formation of 2-propenethioamides or 1-methylsulfanyl-2- propen-1-imines (as mixtures of syn and anti isomers) in 74-100% yield. The reaction of metalated alkoxyethenes with 2-fluorophenyl isothiocyanate opens the way to new benzothiazole derivatives. Hydrolysis of the latter provides a simple method for the preparation of 2-benzothiazolyl ketones.