Search

Your search keyword '"Nozaki H"' showing total 280 results
Start Over Author "Nozaki H" Publication Year Range More than 50 years ago
280 results on '"Nozaki H"'

11. Reactions of carbonyl-stabilized sulphonium ylides with grignard reagents

Author

Nozaki, H., Nakamura, K., and Takaku, M.

Abstract

Sulphonium diacylmethylides RR′-;(COR′)2react with R′'‴MgX to afford ketones R′COR′'′, if either R′' or R′'′ has an α-hydrogen. In the absence of this, for example, the reaction of R(Me)(COPh)2with PhMgBr results in elimination of the S-;Me and gives a product RSC(COPh2. If R, R′, R′' and R‴ are all Ph groups, benzophenone and Ph2HCOPh are formed. The reaction of phenacylides R(Me)HCOPh with R‴MgX proceeds with elimination of R‴Me to produce RSCH2COPh. Reactions of PhLi with these ylides are also recorded.

Published
1969
Full Text
View/download PDF

12. Photochemical reaction of benzopyridines with alkanoic acids

Author

Noyori, R., Katô, M., Kawanisi, M., and Nozaki, H.

Abstract

Photoreaction of acridine with aliphatic carboxylic acids results in decarboxylation and formation of 9-alkylacridans. Irradiation of δ-(9-acridyl)valeric arid or ε-(9-acridyl)caproic acid yields spiro compounds, 9,9-tetramethylene- and 9,9-pentamethyleneacridan, respectively. Extention of the reaction to quinoline as a substrate gives rise to 2- and 4-alkylquinolines and 4-alkyl-1,2,3,4-tetrahydroquinolines. Similar treatment of isoquinoline gives 1-alkylisoquinolines. The mechanistic implication of the photoalkylation is discussed in terms of the acid-base equilibrium between carboxylic acid and the photoexrited nitrogen heterocycle.

Published
1969
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results