Synthesis, reactions and structure–activity relationships of 1-hydroxyspiro[2.5]cyclooct-4-en-3-ones: Illudin analogs with in vitro cytotoxic activity
摘要:
1-Hydroxyspiro [2.5]cyclooet-4-en-3-ones-analogs of natural illudines-were prepared in good yields by cyclization of 1,3-dicarbonyl dianions or 1,3-bis-silyl enol ethers ('masked dianions') with 1,1-diacylcyclopropanes. Several spirocyclopropanes showed a significant antiproliferative activity against human leukemia HL60 cells in vitro. 1-Hydroxyspiro [2.5]cyclooct-4-en-3-ones represent highly reactive precursors of unstable spiro[5.2]cycloocta-4,7-dien-6-ones and reactions with a number of nucleophiles were studied. (c) 2006 Elsevier Ltd. All rights reserved.
Domino “[3+3]-Cyclization-Homo-Michael” Reactions of 1,3-Bissilyl Enol Ethers with 1,1-Diacylcyclopropanes
作者:Gopal Bose、Van Thi Hong Nguyen、Ehsan Ullah、Sunanda Lahiri、Helmar Görls、Peter Langer
DOI:10.1021/jo0485278
日期:2004.12.1
The Lewis acid mediated domino " [3+3] -cyclization-homo-Michael" reaction of 1,3-bissilyl enol ethers with 1,1-diacylcyclopropanes allows an efficient one-pot synthesis of functionalized salicylates containing a halogenated side chain. A great variety of substitution patterns could be realized by variation of the starting materials and of the Lewis acid. The mechanism of the domino process was studied.
Synthesis of dibenzo[b,d]pyran-6-ones based on a ‘[3+3] cyclization–Suzuki cross-coupling’ strategy
作者:Van Thi Hong Nguyen、Peter Langer
DOI:10.1016/j.tetlet.2004.12.030
日期:2005.2
Functionalized dibenzo[b,d]pyran-6-ones were prepared by sequential '[3+3] cyclization-Suzuki cross-coupling' reactions. (C) 2004 Elsevier Ltd. All rights reserved.
[3+3] Cyclizations of 1,3-Bis(silyl enol ether)s with 1,1-Diacetylcyclopentane and 1,1-Diacetylcyclopropane