7-hydroxy-3,4-dihydro-2H-2,4a,5-triaza-fluoren-1-one 、
N-Boc-4-羟基哌啶 、
三苯基膦 、
di-tert-butyl (E)-azodicarboxylate 在
4-(1-oxo-1,2,3,4-tetrahydro-2,4a,5-triaza-fluoren-7-yloxy)-piperidine-1-carboxylic acid tert-butyl ester 作用下,
以to give the desired product as a light brown solid (70%)的产率得到4-(1-oxo-1,2,3,4-tetrahydro-2,4a,5-triaza-fluoren-7-yloxy)-piperidine-1-carboxylic acid tert-butyl ester