... Finally, LiAlH 4 reduction provided 5 in 1.2% yield overall from 1. Described herein are high yielding alternatives to the published synthesis of 5 from benzonorbornadiene. Scheme 1. ... 1980, 21: 177; 11 Abdel-Magid AF. ... Longmei Z. Tangsheng P. Huiyan Z. Yan L. Jingyu SJ Org. ...