Process for producing coumarin and derivatives thereof
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0539181A1
公开(公告)日:1993-04-28
A process for producing coumarin or a derivative thereof, which process comprises dehydrogenation of 3,4-dihydrocoumarin or a derivative thereof in the presence of a palladium catalyst by heating under reduced pressure.
A process for producing octahydrocoumarins and same as a product of such process
申请人:SUMITOMO CHEMICAL COMPANY, LIMITED
公开号:EP0757989A1
公开(公告)日:1997-02-12
The present invention involves the production of octahydrocoumarins from coumarins and/or 3,4-dihydrocoumarins in good yields by a simple process which can be industrially carried out by reducing coumarins and/or 3,4-dihydrocoumarins to octahydrocoumarins with hydrogen in the presence of an alcohol and a ruthenium catalyst, and optionally heating resultant 3-(2-hydroxycyclohexyl) propionate contained in the reduction reaction mixture to conduct cyclization/dealcoholization and convert same to octahydrocoumarins.
There are disclosed a polybutadiene composition comprising:
a polybutadiene type polymer, and
at least one compound selected from
a compound of formula (I-1):
1
or a compound of formula (1-2):
2
wherein R
11
to R
28
are the same or different and independently represent a hydrogen atom, an alkyl group, or the like; or
a compound of formula (II):
3
wherein R
1
to R
10
independently represent a hydrogen atom, an alkyl group, or the like; or
a styrene-butadiene copolymer, and a benzoin compound; and an article molded therefrom, and processes for producing the composition and the molded article.
公开了一种聚丁二烯组合物,其中包括
聚丁二烯类聚合物,以及
至少一种选自以下物质的化合物
式(I-1)化合物:
1
或式(1-2)化合物:
2
其中 R
11
至 R
28
相同或不同,且各自代表氢原子、烷基或类似物;或
式 (II) 的化合物:
3
其中 R
1
至 R
10
分别代表氢原子、烷基或类似物;或
苯乙烯-丁二烯共聚物和安息香化合物;以及由其模塑的制品,以及生产该组合物和模塑制品的工艺。
Bhattacharya, Kalyan K.; Pal, Panchanan; Ghosh, Kalpana, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1980, vol. 19, # 3, p. 191 - 194
作者:Bhattacharya, Kalyan K.、Pal, Panchanan、Ghosh, Kalpana、Sen, P. K.
DOI:——
日期:——
AMSBERRY, KENT L.;BORCHARDT, RONALD T., J. ORG. CHEM., 55,(1990) N3, C. 5867-5877