Yoshiko Kobayashi

X ray crystallography of (+)-(R)p methyl phenyl phosphoramidate of ethyl L-phenylalaninate

Abstract The absolute configuration of (+)-(R) p methyl phenyl phosphoramidate of ethyl L-phenylalaninate 1 was determined by X ray crystallography.

Photochemistry of 5-phenyltricyclo[5.2.1.02,6]deca-4,8-dien-3-one: upper singlet excited state involved in intramolecular [2 + 2] photocycloaddition and long-lived triplet excited state in photodimerisation

Upon π,π* excitation, 5-phenyltricyclo[5.2.1.02,6]deca-4,8-dien-3-one predominantly undergoes intramolecular [2 + 2] photocycloaddition probably via the higher singlet excited state (S2), while, upon n,π* excitation, it undergoes predominantly photodimerisation via a relatively long-lived triplet excited state.

Acidity-dependent merged dissociative (A-1) and associative (A-2) mechanisms for methanolysis of methylphenylphosphinanilide

A stereochemical study of the acid-catalysed methanolysis of (–)-(S)-methylphenylphosphinanilide shows that the reaction proceeds by the acidity-dependent merged A-1 and A-2 mechanism.