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[摘要]：A two-step, protecting group-free route for the synthesis of 3,3'-disubstituted and 6,6'-disubstituted chiral BINOL-phosphoric acids has been realized starting from commercially available brominated BINOLs. This synthesis relies on the direct Suzuki coupling of brominated BINOL phosphoric acids. This synthetic strategy is more efficient compared to previous circuitous strategies involving protections and deprotections, and the process is higher yielding relative to the alternative two-step synthesis involving Suzuki coupling of the BINOL. |
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