作者:Tetsuya Eguchi、Yukio Hoshino
DOI:10.1246/bcsj.74.967
日期:2001.5
reduced to 2H-1-benzopyrans through the 1,2-addition of 9-borabicyclo[3.3.1]nonane. Although transition-metal complexes did not have a catalytic effect on the reaction, only by using palladium(II) chloride, could both 2H-1-benzopyran and dihydro-1-benzopyran be obtained to a similar extent. Also, the reduction of chromone using other organoboranes led not to 2H-1-benzopyran, but rather to chromanone through
通过 9-硼双环 [3.3.1] 壬烷的 1,2-加成,色素被区域选择性地还原为 2H-1-苯并吡喃。虽然过渡金属配合物对反应没有催化作用,但仅通过使用氯化钯(II),才能在相似程度上获得2H-1-苯并吡喃和二氢-1-苯并吡喃。此外,使用其他有机硼烷还原色酮不会产生 2H-1-苯并吡喃,而是通过仅还原烯烃部分产生色酮。