- PYRROLOBENZODIAZEPINE DIMER PRECURSOR AND LIGAND-LINKER CONJUGATE COMPOUND THEREOF
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The present invention relates to a pyrrolobenzodiazepine dimer prodrug and a ligand-linker conjugate compound thereof, a composition containing these, and therapeutic use thereof particularly as an anticancer drug. The stability of the compounds themselves and the stability thereof in plasma are excellent and the compounds are advantageous in terms of manifestation of toxicity, and thus the compounds are industrially useful in that it is possible to target proliferative diseases such as cancer, to perform a specific treatment, to maximize the drug efficacy, and to minimize the occurrence of side effects.
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Paragraph 0124; 0126
(2020/02/18)
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- NOVEL ANTIBACTERIAL COMPOUNDS
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The invention relates to novel chimeric antibiotics of formula (I) Wherein R1 is CH2NHCOR5, heteroarylmethyl, heteroaryloxymethyl or heteroarylaminomethyl; R2 is H, OH, OSO3H, OPO3H2, OCH2OPO3H2, OCOCH2CH2COOH, OCOR6; R3 is H or halogen; R4 is (C1-C3)alkyl, (C1-C3)haloalkyl or cycloalkyl; R5 is alkyl or haloalkyl; and R6 is the residue of a naturally occurring amino acid or of dimethylaminoglycine. These chimeric compounds are useful in the manufacture of medicaments for the treatment of infections (e.g. bacterial infections).
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Page/Page column 50
(2010/11/25)
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- Asymmetric hydrogenations for the synthesis of boc-protected 4-alkylprolinols and prolines
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The utility of 4-substituted prolinols and their corresponding prolines in peptides, peptidomimetics, and natural products has motivated researchers to find new and efficient routes for their preparation. Herein, we report a general approach to the synthesis of Boc-protected 4-alkylprolinols and prolines via a divergent asymmetric hydrogenation strategy. Intermediate exocyclic olefins were prepared by Wittig-type reactions with ketone 6 and subjected to hydroxyl and sterically directed reductions. The Crabtree catalyst (Ir[COD] PyPCy3PF6) proved to be highly effective in diastereoselective hydrogenations to give trans- substituted pyrrolidines (9). Good facial selectivities were also observed in heterogeneous hydrogenations with Raney-nickel to obtain cis-substituted pyrrolidines (11). Employing this strategy, we describe the synthesis of novel prolinol and proline-based building blocks for incorporation into biologically relevant peptidomimetics.
- Del Valle, Juan R.,Goodman, Murray
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p. 3923 - 3931
(2007/10/03)
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