Hydrocarbon Activation. Synthesis of β-Cycloalkyl (Di)nitriles through Photosensitized Conjugate Radical Addition
作者:Anna Maria Cardarelli、Maurizio Fagnoni、Mariella Mella、Angelo Albini
DOI:10.1021/jo010400k
日期:2001.11.1
Photoinduced hydrogen abstraction from aliphatic cyclic hydrocarbons (C(5) to C(7), C(12), as well as adamantane) by triplet aromatic ketones in the presence of alpha,beta-unsaturated (di)nitriles offers a straightforward entry to the corresponding alkylated (di)nitriles via the alkyl radicals. Yields are moderate to good depending on the olefins structure (substitution in beta slows down the addition
A series of (1‐adamantyl)phthalimides, 1–4, and (2‐adamantyl)phthalimides, 5–8, characterized by different chain length between the adamantyl and the phthalimide moiety were synthesized, as well as 1‐ and 2‐adamantylphthalimides substituted by nitro 9, 10, and amino group 11, 12, and phthalimides bearing homoadamantyl 13 and protoadamantyl substituent 14 and 15. The compounds were tested for antiproliferative activity in vitro on a series of five human cancer lines: MCF‐7 (breast carcinoma), SW 620 (colon carcinoma), HCT 116 (colon carcinoma), MOLT‐4 (acute lymphoblastic leukemia), H 460 (lung carcinoma), and a non‐tumor cell line HaCaT (human keratinocytes). All compounds except nitro derivatives 9 and 10 exhibited antiproliferative activity. The activity was generally better in the 2‐adamantyl series 5–8 and in the compounds having the longest alkyl spacers as in 4 and 8, or with an amino group as in 9 and 10. The most active compounds with the propylene spacer 4 and 8 showed the highest selectivity toward tumor cells. The activity was found to be due to a delay in the progress through the cell cycle at G1/S phase.
Structure-based design of inhibitors of purine nucleoside phosphorylase. 2. 9-Alicyclic and 9-heteroalicyclic derivatives of 9-deazaguanine
作者:John A. Secrist、Shri Niwas、Jerry D. Rose、Y. Sudhakar Babu、Charles E. Bugg、Mark D. Erion、Wayne C. Guida、Steven E. Ealick、John A. Montgomery
DOI:10.1021/jm00065a007
日期:1993.6
Alicyclic and heteroalicyclic derivatives of 9-deazaguanine (2-amino-1,5-dihydro-4H-pyrrolo[3,2-d][pyrimidin-4-one) d] [pyrimidin-4-one) are, with one exception, potent inhibitors of purine nucleoside phosphorylase (PNP) equaling the corresponding 9-arylmethyl derivatives previously investigated. The mode of binding of these compounds to PNP was determined by X-ray crystallography.