Metal‐Bridged Polymers as Insoluble Multicomponent Asymmetric Catalysts with High Enantiocontrol: An Approach for the Immobilization of Catalysts without Using any Support

For recent reviews see:

10.1021/cr010361c

10.1021/cr0103571

10.1021/cr010335e

10.1021/cr010343v

10.1021/cr0103874

Representative examples of multicomponent asymmetric catalysts:

10.1021/ja00088a056

10.1002/ange.19961080123

10.1002/anie.199601041

10.1002/chem.19960021107

10.1021/ja973064r

10.1002/(SICI)1521-3757(19990215)111:4<517::AID-ANGE517>3.0.CO;2-E

10.1002/(SICI)1521-3773(19990215)38:4<495::AID-ANIE495>3.0.CO;2-O

10.1021/ja001642p

10.1021/ol991189q

10.1021/ol034143c

10.1016/0040-4039(95)00134-X

For recent reviews see:

10.1002/ange.19971091204

10.1002/anie.199712361

10.1016/S0040-4020(01)00057-6

10.1021/cr010297z

10.1021/ja993814s

10.1038/35010088

10.1021/ja0163772

For the design and synthesis of the new metal‐bridged polymer binol was chosen to be modified as chiral multidentate ligands because binol as a ligand is used in various chiral metal catalysts.

10.1055/s-1992-26147

10.1021/ja00505a056

10.1351/pac199870081509

10.1039/a802509f

10.1016/S0920-5861(00)00405-3

10.1021/cr970463w

10.1021/cr980414z

10.1021/cr010444t

10.1021/cr010288q

10.1021/jo0255680

10.1021/ja001036u

10.1016/S0957-4166(02)00573-6

Al‐bridged polymer (generated from ligand2 dwith LiAlH4in the ratio of 1:1): Elemental analysis calcd (%) for polymeric C52H46AlLiO7(containing three molecules of THF per active site): C 76.46 H 5.68; found: C 76.26 H 5.75. IR: ALB complex 2871 1591 1502 1463 1425 1340 1126 1049 953 860 816 746 cm−1 Al‐bridged polymer 2862 1587 1499 1458 1423 1339 1126 1045 949 862 820 746 cm−1.

Ti‐bridged polymer: Elemental analysis calcd (%) for polymeric C47H30O6Ti2(containing one molecule of toluene per active site): C 71.78 H 3.84; found: C 71.96 H 4.15. IR: Ti‐binol complex 1585 1499 1458 1333 1234 1113 1078 974 935 814 746 cm−1 Ti‐bridged polymer 1583 1499 1454 1427 1333 1236 1074 976 941 820 727 cm−1.

Recent progress in immobilized multicomponent asymmetric catalysts:

10.1021/ol006837g

10.1016/S0957-4166(01)00443-8

10.1002/ange.200250536

10.1002/anie.200250536

10.1021/ol034797l

10.1016/S0040-4039(00)01486-6

10.1002/1615-4169(20010430)343:4<369::AID-ADSC369>3.0.CO;2-3

10.1021/ja000778k

10.1021/ol006898e

10.1016/S0040-4039(99)01663-9

10.1016/S0040-4039(02)00427-6