Phase-Transfer Catalysts

Chiral Phase-Transfer Catalysts

Chiral Phase-Transfer Catalysts

D3475 D3475 D3476 D3476 B1683 B1683
B1689 B1689 B1684 B1684 B1685 B1685
D3475 6,10-Dibenzyl-N,N'-dimethyl-N,N,N',N'-tetrakis(4-methylbenzyl)-1,4-dioxaspiro[4.5]decane-(2R,3R)-diylbis(methylammonium) Tetrafluoroborate [=(R,R)-TaDiAS-2nd]
D3476 6,10-Dibenzyl-N,N'-dimethyl-N,N,N',N'-tetrakis(4-methylbenzyl)-1,4-dioxaspiro[4.5]decane-(2S,3S)-diylbis(methylammonium) Tetrafluoroborate [=(S,S)-TaDiAS-2nd]
B1683 N-Benzylcinchonidinium Chloride [Chiral Phase-Transfer Catalyst]
B1689 N-Benzylcinchoninium Chloride [Chiral Phase-Transfer Catalyst]
B1684 N-Benzylquinidinium Chloride [Chiral Phase-Transfer Catalyst]
B1685 N-Benzylquininium Chloride [Chiral Phase-Transfer Catalyst]
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Quaternary Ammonium Compounds


Crown Ethers


Phosphonium Compounds


Pyridinium Compounds


Viologens

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Literature

1)H. H. Treedman, et al., Tetrahedron Lett., 1975, 3251; J. Dockx, Synthesis, 1973, 441.
2)D. Landini, et al., Synthesis, 1974, 565.
3)F. L. Cook, et al., J. Org. Chem., 1974, 39, 3416.
4)C. M. Starks, et al., J. Am. Chem. Soc., 1971, 93, 195.
J. M. McIntosh, J. Chem. Educ., 1978, 55, 235; P. Varughese, J. Chem. Educ., 1977, 54, 666; J. Dockx, Synthesis, 1973, 441; G. W. Gokel, et al., Synthesis, 1976, 168; J. Chem. Educ., 1976, 53, 618.

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