Selective Catalytic sp3 C–O Bond Cleavage with C–N Bond Formation in 3-Alkoxy-1-propanols
摘要:
The ruthenium catalyzed selective sp(3) C-O cleavage with amide formation was reported in reactions of 3-alkoxy-1-propanol derivatives and amines. The cleavage only occurs at the C3-O position even with 3-benzyloxy-1-propanol. Based on the experimental results, O-bound and C-bound Ru enolate complexes were proposed as key intermediates for the unique selective sp(3) C-O bond cleavage in 3-alkoxy-1-propanols.
Tetrazoles were effectively synthesized from amides using diphenyl phosphorazidate or bis(p-nitrophenyl) phosphorazidate in the presence of aromaticbases. Various amides underwent the proposed cycloaddition reaction to provide the corresponding tetrazoles. Studies on the racemization of chiral substrates were also performed. Overall, the proposed synthesis method enables the preparation of 1,5-disubstituted
Oxyacetamide compounds useful for stimulating or inducing the growth and/or retarding the loss of keratin fibers
申请人:Rozot Roger
公开号:US20070092467A1
公开(公告)日:2007-04-26
Oxyacetamide compounds that are inhibitors of type-1 15-hydroxyprostaglandin dehydrogenase (15-PGDH) and which have the formula (I), or salts and/or solvates thereof:
are useful for inducing and/or stimulating the growth of human keratin fibers, e.g., human head hair and/or eyelashes, and/or for retarding the loss and/or increasing the density thereof and/or for caring for and/or making up such keratin fibers.
Nu-substituted oxyacetamide compounds and insect control compositions
申请人:LOWELL B KILGORE
公开号:US02484295A1
公开(公告)日:1949-10-11
Administration of 2-oxyacetamide compounds for promoting and/or inducing and/or stimulating the pigmentation of keratin materials and/or for limiting the depigmentation and/or bleaching thereof
申请人:Rozot Roger
公开号:US20080166310A1
公开(公告)日:2008-07-10
A regime or regimen for promoting and/or inducing and/or stimulating the pigmentation of keratin materials and/or for preventing and/or limiting the depigmentation and/or bleaching and/or for preventing and/or limiting the canities thereof, more particularly of human keratin fibers such as the hair, beard hair, moustache hair, the eyelashes and the eyebrows, includes administering to an individual in need of such treatment at least one 2-oxyacetamide compound of formula (I), or a salt and/or solvate thereof: