| 摘要 |
<p>This invention relates to a process for preparation of an indolopyrrolocarbazole derivative ÄIÜ by treating a compound ÄVÜ with a base in an inert solvent to prepare a compound ÄIVÜ, reacting the obtained compound ÄIVÜ with a compound ÄIIIÜ to prepare a compound ÄIIÜ and then removing the protective groups of the compound ÄIIÜ, the preparation intermediates compound ÄIIÜ, compound ÄIIIÜ and compound ÄIVÜ, and processes for preparation of the compound ÄIIIÜ. <CHEM> wherein Y<1> represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, a phenyl group, a benzyloxymethyl group or an aralkyl group, R<1>, R<2>, R<3>, R<4>, R<5> and R<6> may be the same or different and each represent a protective group of a hydroxyl group, R<7> and R<8> may be the same or different and each represent a hydrogen atom or a protective group of a hydroxyl group, and X represents an acid molecule. This invention provides a safe and easy industrial preparation process of the indolopyrrolocarbazole derivative ÄIÜ useful as an antitumor agent.</p> |
