Process for preparing alkenyl-substituted heterocycles
申请人:——
公开号:US20020123633A1
公开(公告)日:2002-09-05
Described are preferred processes for preparing alkenyl-substituted nitrogenous heterocycles such as vinylpyridines, which comprise reacting a corresponding methyl-substituted heterocycle with a C
1
compound such as formadehyde in the vapor phase over a zeolite catalyst having acidic and basic catalytic sites. The preferred zeolite is a medium-pore zeolite, for example having a constraint index of about 0.5 to about 12. Processes of the invention can be conducted as facile, one-step syntheses utilizing relatively low ratios of alkyl-substituted starting heterocycle (e.g. &agr;-picoline or &ggr;-picoline) to formaldehyde while nonetheless achieving high selectivities and yields of the corresponding alkenyl compound.
LAUNDRY BLEACHING KIT AND METHOD OF BLEACHING A SUBSTRATE
申请人:UNILEVER PLC
公开号:EP1319061A1
公开(公告)日:2003-06-18
US6596872B2
申请人:——
公开号:US6596872B2
公开(公告)日:2003-07-22
[EN] LAUNDRY BLEACHING KIT AND METHOD OF BLEACHING A SUBSTRATE<br/>[FR] NECESSAIRE DE BLANCHIMENT DU LINGE ET PROCEDE DE BLANCHIMENT D'UN SUBSTRAT
申请人:UNILEVER PLC
公开号:WO2002024852A1
公开(公告)日:2002-03-28
The invention relates to catalytically bleaching substrates, especially laundry fabrics, with atmospheric oxygen and selective application of a peroxyl species to specific types of stain.
[EN] PROCESS FOR PREPARING VINYL-SUBSTITUTED HETEROCYCLES<br/>[FR] PROCEDE DE PREPARATION D'HETEROCYCLES PORTANT DES SUBSTITUANTS VINYLIQUES
申请人:REILLY IND INC
公开号:WO2002034720A1
公开(公告)日:2002-05-02
Described are preferred processes for preparing alkenyl-substituted nitrogenous heterocycles such as vinylpyridines, which comprises reacting a corresponding methyl-substituted heterocycle with a C1 compound such as formaldehyde in the vapor phase over a zeolite catalyst having acidic and basic catalytic sites. The preferred zeolite is a medium-pore zeolite, for example having a constraint index of about 0.5 to about 12. Processes of the invention can be conducted as facile, one-step syntheses utilizing relatively low ratios of alkyl-substituted starting heterocycle (e.g. α-picoline or γ-picoline) to formaldehyde while nonetheless achieving high sensitivities and yields of the corresponding alkenyl compound.