in toluene byproducts: tBu2Sn(OH)Cl, LiI; dissoln. and cooling of I-compd. (-78°C), addn. of soln. of Ph3SnLi, stirring and removal of cooling (several h);

in tetrahydrofuran byproducts: tBu2Sn(OH)Cl, LiI; dissoln. and cooling of I-compd. (-78°C), addn. of soln. of Ph3SnLi, stirring and removal of cooling (several h);

in tetrahydrofuran byproducts: tBu2Sn(OH)Cl, LiI; dissoln. and cooling of I-compd. (-78°C), addn. of soln. of Ph3SnLi, stirring and removal of cooling (several h);