C - Chemistry – Metallurgy – 07 – J
Patent
C - Chemistry, Metallurgy
07
J
C07J 21/00 (2006.01) C07J 19/00 (2006.01) C07J 75/00 (2006.01)
Patent
CA 2552449
Multiple novel reaction schemes, novel process steps and novel intermediates are provided for the synthesis of epoxymexrenone and other compounds of formula (I): (see formula I) wherein: -A-A- represents the group -CHR4-CHR5- or -CR4=CR5-; R3, R4 and R5 are independently selected from the group consisting of hydrogen, halo, hydroxy, lower alkyl, lower alkoxy, hydroxyalkyl, alkoxyalkyl, hydroxycarbonyl, cyano, aryloxy; R1 represents an alpha-oriented lower alkoxycarbo- nyl or hydroxyalkyl radical; -B-B- represents the group -CHR6-CHR7- or an alpha-or beta-oriented group of formula (III): Image wherein: R6 and R7 are independently selected from the group consisting of hydrogen, halo, lower alkoxy, acyl, hydroxyalkyl, alkoxyalkyl, hydroxycarbonyl, alkyl; alkoxycarbonyl, acyloxyalkyl, cyano, aryloxy; and R8 and R9 are independently selected from the group consisting of hydrogen, halo, lower alkoxy, aryl, hydroxyalkyl, alkoxyalkyl, hydroxycarbonyl, alkyl, alkoxycarbonyl, acyloxyalkyl, cyano, aryloxy, or R8 and R9 together comprise a carbocyclic or heterocyclic ring structure, or R8 or R9 together with R6 or R7 comprise a carbocyclic or heterocyclic ring structure fused to the pentacyclic D ring.
Anderson Dennis K.
Baez Julio A.
Erb Bernard
Kunda Sastry A.
Lawson Jon P.
G.d. Searle & Co.
Osler Hoskin & Harcourt Llp
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