摘要:
Reaction of indolyldiketopiperazine 5 with 2,3,4,5,6,6-hexachlorocyclohexadien-1-one (25) in dichloromethane/methanol provided the methoxyindolenine 29, which in the presence of TFA rearranged to the dehydrodiketopiperazine 6. This compound was elaborated to verruculogen TR-2 (2) employing osmium tetroxide oxidation.