公开(公告)号：CA2048193A1

公开(公告)日：1992-02-02

申请号：CA2048193

申请日：1991-07-30

Applicant: HOECHST AG

Inventor： SCHMAILZL GEORG

IPC: B01J31/02 ,  C07D221/00 ,  C07D263/00 ,  C07D498/10 ,  C07D498/20 ,  C07D519/00 ,  C08K5/35

Abstract: HOE 90/F 231 Process for the preparation of 1-oxa-3,8-diaza-4-oxospiro¢4.5!decane compounds The invention relates to an environmentally friendly process for the preparation of compounds of the formula below in which R1 and R2 are preferably H or alkyl, R3 and R4 are preferably alkyl or cycloalkyl, R5 and R6 are preferavly hydrogen or methyl and R7 is in particular alkyl. In the process, the additional use of a phase transfer catalyst can be dispensed with without loss in yield.

公开(公告)号：BR9002831A

公开(公告)日：1991-08-20

申请号：BR9002831

申请日：1990-06-15

Applicant: HOECHST AG

Inventor： SCHMAILZL GEORG ,  PFAHLER GERHARD ,  NOWY GUENTHER

IPC: C07D498/10 ,  C07D519/00 ,  C08G73/06 ,  C08K5/34 ,  C08K5/3432 ,  C08K5/3435 ,  C08K5/35 ,  C08K5/353 ,  C08L23/00 ,  C08L87/00 ,  C08L101/00 ,  C08G65/00

Abstract: Novel polymeric polyalkyl-1-oxa-diazaspirodecanes of the formula I (I) are very effective stabilizers for natural any synthetic polymers. They have very low volatility, high migration resistance and high thermal stability.