2-azabicyclo¬2.2.1 hept-5-ene-2-acetic acid, derivatives thereof and related compounds, process for the preparation of said compounds and the use of said compounds for the manufacture of n-phosphonomethylglycine

Abstract From the Canadian patent

A compound having the structure, V, wherein R3 R4, R5, R6, R7 and R8 are each independently hydrogen C1-C4 alkyl, C6H5 or NO2; Y is COOR, CON(R1)2 or CN wherein R and, R1 are each independently hydrogen or C1-C4 alkyl with the proviso that when R3, R4, R5, R6, R7 and R8 are hydrogen R is, independently hydrogen or C2-C4 alkyl. These compounds are useful as intermediates in the preparation of N-phosphonomethylglycine a, known herbicide and plant growth regulator.