The14C,13C and15N syntheses of MON 37500, a sulfonylurea wheat herbicide
作者:Brad D. Maxwell、Olivier G. Boyé、Kazunari Ohta
DOI:10.1002/jlcr.934
日期:2005.5
[14C] and [13C]MON37500 labeled in the imidazopyridine (Im) ring system were synthesized in seven steps in an overall yield of 39 and 28%, respectively, from [2-14C] and [2-13C]chloroacetic acid. [14C]MON37500 labeled in the pyrimidine (Pd) ring system was synthesized from [2-14C]diethyl malonate in four steps in 48% yield. Lastly, [15N]MON37500 was prepared in three steps in an overall yield of