摘要:
Novel compounds of the general formula, wherein each of R°, R, R 1 , R 2 , and R 3 independently represents a hydrogen atom or an alkyl group or R° and R together represent an alkylene group; X represents one of the groups wherein R 4 represents a hydrogen atom or an optionally substituted aryl or alkyl group and R 5 represents a hydrogen atom, an alkyl group, an alkenyl group or an alkynyl group; and Ar represents an optionally substituted fully unsaturated ring having 5 or 6 atoms in the ring of which one is a nitrogen atom and the remainder are carbon atoms, or the N-oxide or an acid addition salt thereof, or Ar represents an optionally substituted phenyl group; exhibit useful herbicidal properties.
摘要:
Substituted azetidinone carboxylates of the general formula I wherein R, represents a benzyl, benzhydryl or tosyl group and R 2 represents a hydrogen atom or an alkyl group of up to 6 carbon atoms;
process for the preparation of azetidinones of formula I, which comprises oxidising an N-substituted dioxopyrrolidine of general formula II:-
process for the preparation of an N-substituted-3-hydroxymethyl azetidine derivative of general formula III
which comprises reduction of an N-substituted azetidinone carboxylate of general formula I above.
摘要翻译:取代的通式I 的氮杂环丁酮羧酸盐,其中R 1表示苄基,二苯甲基或甲苯磺酰基,R 2表示氢原子或至多6个碳原子的烷基; 用于制备式I的氮杂环丁酮的方法,其包括将通式II的N-取代的二氧代吡咯烷氧化:制备通式III的N-取代-3-羟甲基氮杂环丁烷衍生物的方法,其中 包括还原上述通式I的N-取代的氮杂环丁酮羧酸酯。 t