METHOD FOR PRODUCING 5- (ALFA-HYDROXYALKYL) BENZO- [1,3] DIOXOLANE
申请(专利)号:
DE1999613735T
申请日期:
1999-10-14
公开/公告号:
DE69913735T2
公开/公告日期:
2004-07-29
申请(专利权)人:
ENDURA S.P.A., BOLOGNA, IT
摘要:
The present invention regards a three-step process for the synthesis of 5-(alpha-hydroxyalkyl) benzo[1,3]dioxols. The process comprises: (i) the reaction of pyrocatechin (1,2-dihydroxybenzene) with a dihalo or di-alkoxyalkane, with the formation of a benzo[1,3]dioxol derivative; (ii) 5-selective catalytic acylation of the benzo[1,3]dioxol, with formation of a 5-alkanoylbenzo[1,3]dioxol and its subsequent (iii) reduction to 5-(alpha-hydroxyalkyl) benzo[1,3]dioxol. Also described are new benzodioxols obtainable using the above-mentioned process. The process of the invention is industrially simple and has low environmental impact; it allows to obtain in high yields derivatives of considerable interest, in particular for the perfumery industry, and in the sector of insecticides.
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