Publications by authors named "Masahiko Suda"
[reaction: see text] Bis(pyridine)iodonium tetrafluoroborate was successfully used for regioselective iodination of BINAP dioxide to give 5,5'-diiodoBINAP dioxide in an excellent yield of 92%, with no observed formation of 4,4'-diiodoBINAP dioxide. A Sonogashira cross-coupling reaction with 5,5'-diiodoBINAP dioxide gave the desired bis(trimethylsilylethynyl) product in 86% yield. The resulting 5,5'-disubstituted BINAP dioxides were reduced to the corresponding phosphines, which were used as chiral ligands for rhodium-catalyzed asymmetric 1,4-addition of phenylboronic acid to 2-cyclohexenone to give 3-phenylcyclohexanone in excellent yield with high enantioselectivity.
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- The study introduces new bridged allylorganosilanes as effective precursors for creating ordered mesoporous organosilica with crystal-like pore structures.
- This innovative synthesis method enables the production of mesoporous materials that contain large organic groups, which are usually difficult to purify.
- The approach enhances the ability to create periodic mesostructures in mesoporous organosilica, potentially broadening its applications in various fields.