N-benzyl,3-hydroxymethyl and 3-alkanoyloxymethyl azetidine derivatives
申请人:Shell Oil Company
公开号:US04634554A1
公开(公告)日:1987-01-06
Substituted azetidine derivatives of formula ##STR1## in which R represents chlorine, bromine, hydroxy or alkanoyloxy of up to 6 carbon atoms, processes for their preparation and their use as intermediates for the preparation of azetidine-3-carboxylic acid.
Substituted azetidine derivatives, process for their preparation, and their use as intermediates
申请人:SHELL INTERNATIONALE RESEARCH
MAATSCHAPPIJ B.V.
公开号:EP0140437A2
公开(公告)日:1985-05-08
Substituted azetidine derivatives of formula
in which R1 represents a methyl group substituted by at least one phenyl group; and R2 represents a chlorine or bromine atom or a hydroxy or alkanoyloxy group of up to 6 carbon atoms, processes for their preparation and their use as intermediates for the preparation of azetidine-3-carboxylic acid derivatives.
Aryl and alkyl substituted 3- and 5-nitroisoxazole derivatives were prepared from the appropriate 3- and 5-nitro-4,5-dihydroisoxazoles using manganese(IV) oxide as oxidizing agent. Some of the 3-nitro-4-substituted isoxazoles were prepared directly by reaction of 2-substituted 3-bromo-l-halopropanes with sodium nitrite.