alpha-benzoyloxy- and alpha-methoxy-substituted glycine derivatives as atypical substrates for free-radical reactions with stannanes

alpha-Benzoyloxy- and alpha-methoxy-substituted glycine derivatives undergo homolytic reactions with tributyltin hydride to give the reduction product . With allyltributyltin they afford the product of allyl group transfer and the corresponding dimeric glycine derivative, while their reactions with h exabutylditin and di-tert-butyl disulfide afford the dimer and the alpha-te rt-butylthio-substituted glycine derivative. The free-radical nature of the se reactions is most clearly demonstrated in the formation of the glycine d imer.