4,8-Dihydropyrrol[3,4-f]isoindole as a Useful Building Block for Near-Infrared Dyes
作者:Hidemitsu Uno、Mitsunori Nakamura、Kazuki Jodai、Shigeki Mori、Tetsuo Okujima
DOI:10.3987/com-14-s(k)91
日期:——
4,8-Dihydropyrrol[3,4-f]isoindole was prepared from 4,7-dihydroisoindole based on the modified Barton-Zard reaction. Addition of phenylsulfenyl chloride followed by oxidation and dehydrochlorination gave phenylsulfonyldihydroisoindole, which underwent the smooth reaction with an isocyanoacetate under basic conditions to give 4,8-dihydropyrrol[3,4-f]isoindole-1,5- and 1,7-dicarboxylates in good yields. The pyrrolisoindole was successfully converted to the benzene-fused bisBODIPY, absorption maximum of which was 758 nm.