Synthetic Studies on d-Biotin, Part 6: An Expeditious and Enantiocontrolled Approach to the Total Synthesis of d-Biotin via a Polymer-Supported Chiral Oxazaborolidine-Catalyzed Reduction of meso-Cyclic Imide Strategy - Chen, Fen-Er; Yuan, Jian-Li; Dai, Hui-Fang; Kuang, Yun-Yan; Chu, Yong (Synthesis, 2003)