2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3'-indol]-2(1'H)-one 、
(8S)-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3'-indol]-2'(1'H)-one 、
3,5-二氟溴苄 、
1-溴戊烷 以1′-(3,5-difluorobenzyl)-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3′-indol]-2′(1′H)-one was obtained (72%) as a colorless solid的产率得到1'-(3,5-difluorobenzyl)-2,3-dihydrospiro[furo[2,3-g][1,4]benzodioxine-8,3'-indol]-2'(1'H)-one