摘要:
In contrast to the earlier reported inertness of 5-benzyloxy-1-phenyltetrazole, (1a), and 3-benzyloxy-1,2-benzisothiazole 1,1-dioxide, (2a), towards catalytic transfer hydrogenolysis in toluene/water solvent systems, it is now shown that simply changing the solvent to tetrahydrofuran/water leads to their rapid hydrogenolysis with formation of toluene. Compound (1a), C14H12N4O, has a short C-O ether bond to the tetrazole ring [1.3261(15) Angstrom] and a particularly long C-O bond to the benzyl group [1.4676(16) Angstrom], consistent with an activation of this longer bond by the strongly electronegative tetrazole unit.