Chiral 3-(1,2,5-trisubstituted imidazolidinone) azetidinone anti

Details Chiral 3-(1,2,5-trisubstituted imidazolidinone) azetidinone anti Chiral 3-(1,2,5-trisubstituted imidazolidinone) azetidinone anti

1986-07-24

1988-09-20

Berch, Mark L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Unsubstituted hydrocarbyl chain between the ring and the -c-...

548337, 548225, C07D40304, C07D40514, C07D40914, C07D23332

Patent

active

047726946

ABSTRACT:
2,5-Disubstituted oxazolidin-4-one-3-ylacetyl chlorides and 1,2,5-substituted imidazolidin-4-one-3-yl-acetyl chlorides function as chiral auxiliary moieties in the asymmetric cycloaddition with aldimines to provide cis-azetidinones. The azetidinones are useful intermediates in the preparation of antibiotics.

REFERENCES:
patent: 4166816 (1979-09-01), Gleason et al.
patent: 4200572 (1980-04-01), Gleason et al.
Ernst et al, Chem. Abs. 93, 26367.
Soma et al, Chem. Abs. 82, 156034t.
Ikota et al., Heterocycles, vol. 22, No. 10, pp. 2227-2230, 1984.
Evans et al., Tetrahedron Letters, vol. 26, No. 32, pp. 3783-3786, (1985).
Evans et al., Tetrahedron Letters 26, pp. 3787-3790, (1985).

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