Reaktion #574838

ord-a050b0d9c48946d8b8c1802e94f306bb

Reaktionsgleichung

CC1(C)Oc2ccc(C#N)cc2[C@@H](n2ccc(CO[Si](C)(C)C(C)(C)C)cc2=O)[C@@H]1O
trans-3-hydroxy-6-cyano-3,4-dihydro-2,2-dimethyl-4-(1,2-dihydro-2-oxo-4-t-butyldimethylsilyloxymethyl-1-pyridinyl)-2H-benzo[b]pyran
CC1(C)Oc2ccc(C(F)(F)F)cc2[C@@H](n2ccc(CO[Si](C)(C)C(C)(C)C)cc2=O)[C@@H]1O
trans-3-hydroxy-6-trifluoromethyl-3,4-dihydro-2,2-dimethyl-4-(1,2-dihydro-2-oxo-4-t-butyldimethylsilyloxymethyl-1-pyridinyl)-2H-benzo[b]pyran
→
CC1(C)C=C(n2ccc(CO[Si](C)(C)C(C)(C)C)cc2=O)c2cc(C(F)(F)F)ccc2O1
6-trifluoromethyl-2,2-dimethyl-4-(1,2-dihydro-2-oxo-4-t-butyldimethylsilyloxymethyl-1-pyridinyl)-2H-benzo[b]pyran

Edukte

CC1(C)Oc2ccc(C#N)cc2[C@@H](n2ccc(CO[Si](C)(C)C(C)(C)C)cc2=O)[C@@H]1O
trans-3-hydroxy-6-cyano-3,4-dihydro-2,2-dimethyl-4-(1,2-dihydro-2-oxo-4-t-butyldimethylsilyloxymethyl-1-pyridinyl)-2H-benzo[b]pyran
CC1(C)Oc2ccc(C(F)(F)F)cc2[C@@H](n2ccc(CO[Si](C)(C)C(C)(C)C)cc2=O)[C@@H]1O
trans-3-hydroxy-6-trifluoromethyl-3,4-dihydro-2,2-dimethyl-4-(1,2-dihydro-2-oxo-4-t-butyldimethylsilyloxymethyl-1-pyridinyl)-2H-benzo[b]pyran

Reagenzien

Keine

Reaktionsbedingungen

Detaillierte Bedingungen
See reaction.notes.procedure_details.

Aufarbeitung

  1. 1
    SonstigeThe reaction

Vorschrift

The reaction and after treatment of Example 8 are repeated, except that the trans-3-hydroxy-6-cyano-3,4-dihydro-2,2-dimethyl-4-(1,2-dihydro-2-oxo-4-t-butyldimethylsilyloxymethyl-1-pyridinyl)-2H-benzo[b]pyran used in Example 8 is replaced with the trans-3-hydroxy-6-trifluoromethyl-3,4-dihydro-2,2-dimethyl-4-(1,2-dihydro-2-oxo-4-t-butyldimethylsilyloxymethyl-1-pyridinyl)-2H-benzo[b]pyran obtained in Example 50. Thus, 6-trifluoromethyl-2,2-dimethyl-4-(1,2-dihydro-2-oxo-4-t-butyldimethylsilyloxymethyl-1-pyridinyl)-2H-benzo[b]pyran is obtained.

Quelle

DOI: 10.6084/m9.figshare.5104873.v1Patent: US05296492uspto-grants-1994_03