molecular sieve 1.) DMF, 30 min, r.t.-> 2 h, 90 deg C, 2.) toluene, phosphate buffer pH = 6,5, 1 h, r.t.; Yield given. Multistep reaction;

molecular sieve 1.) DMF, 30 min r.t. -> 2 h, 90 deg C, 2.) toluene, phosphate buffer pH = 6,5, 1 h, r.t.; Yield given. Multistep reaction;