processo de produção de caspofungina e seus intermediários

The present invention relates to novel intermediates of formula VII, or an acid addition salt or a solvate thereof, wherein R1 is -(CO)NH2, -CH2NH2 or -CN; R2=R3=H or R2 and R3 together form a cyclic boronate or borate ester; X is a helping group selected from the group consisting of i) a five or six membered heterocyclic aromatic ring and derivatives thereof comprising at least one N-atom being a part of an imine-group, wherein said N-atom forms the point of connection to the cyclohexapeptide ring, and ii) tetrazolyl and derivatives thereof for which a nitrogen atom forms the point of connection to the cyclohexapeptide ring, and a process for the preparation of caspofungin utilizing said intermediates.