摘要:
Disclosed is a total synthesis of a biologically active β-Lactam—Compound 3, which is related to Salinosporamide A and Omuralide, both structurally and by its activity as a proteasome inhibitor. Also disclosed are proteasome inhibiting compounds having the formula: wherein: R1 is a cyclolower alkyl group; or R1 is a lower alkyl group; and R2 is either hydrogen or a lower alkyl group; R3 is either hydrogen or a lower alkyl group; R4 a halo-lower alkyl group; and R5 is either hydrogen or a lower alkyl group.
摘要翻译:公开了生物活性β-内酰胺 - 化合物3的全合成,其与结构上和通过其作为蛋白酶体抑制剂的活性与Salinosporamide A和Omuralide有关。 还公开了具有下式的蛋白酶体抑制化合物:其中:R 1是环状烷基; 或R 1是低级烷基; 并且R 2是氢或低级烷基; R 3是氢或低级烷基; R 4卤代低级烷基; 并且R 5是氢或低级烷基。
摘要:
A process for preparing an intermediate compound of formula (II) where X is as defined in the specification, R1 is haloalkyl, alkyl, alkenyl, cycloalkyl, carboxyalkyl, alkoxycarbonylalkyl, aryl or arylalkyl; R2, R3, R4 and R5 are organic groups as defined in the specification, which process comprises aromatisation of a compound of formula (III) where R1, R2, R3, n, X and R5 are as defined in relation to formula (II) and R4′ is a group R4 or a precursor group thereof, and thereafter if necessary or desired, carrying out one or more of the following steps: (i) removing any hydroxy-protecting groups R; (ii) converting a precursor group R4′ to a group R4, or where R4′ is a group R4, converting it to a different such group. Compounds obtained are useful intermediates for example in the preparation of fulvestrant. Novel intermediates are also claimed.