Regiocontrolled Synthesis of Carbocycle-Fused Indoles via Arylation of Silyl Enol Ethers with <i>o</i>-Nitrophenylphenyliodonium Fluoride
作者:Tetsuo Iwama、Vladimir B. Birman、Sergey A. Kozmin、Viresh H. Rawal
DOI:10.1021/ol990759j
日期:1999.8.1
[formula: see text] A new, regiocontrolledsynthesis of carbocycle-fused indoles has been developed. The two-step procedure involves first the regiospecific arylation of silyl enol ethers with o-nitrophenylphenyliodonium fluoride (1). Reduction of the nitro group on the aromatic ring with TiCl3 followed by spontaneous condensation of the aniline with the ketone then affords the indole products.
Silyl enol ethers are extremely useful nucleophilic intermediates for chemical transformations because they are synthetically versatile substrates for a wide range of C–C bond-forming reactions. Here, we present a new, mild, and solvent-free procedure for the synthesis of silyl enol ethers that employs a catalytic amount of solid-supported base and an equimolar amount of N,O-(bistrimethylsilyl)acetamide
Ynolates were found to react with alpha-alkoxy-, alpha-siloxy-, and alpha-aryloxyketones at room temperature to afford tetrasubstituted olefins with high Z selectivity. Since the geometrical selectivity was determined in the ring opening of the beta-lactone enolate intermediates, the torquoselectivity was controlled by the ethereal oxygen atoms. From experimental and theoretical studies, the high Z
Preventive and/or Therapeutic Agent for Diabetic Vascular Disorder and Respiratory Disorder
申请人:Satoh Keisuke
公开号:US20080312336A1
公开(公告)日:2008-12-18
The present invention provides preventive and/or therapeutic agents for either one, or both, of a diabetic vascular disorder and a diabetic respiratory disorder comprising, as an active ingredient, a cyclohexenone long chain alcohol compound represented by the following formula (1):
[wherein R
1
, R
2
, and R
3
each represent a hydrogen atom or a methyl group, and X represents a linear or branched C10-C28 alkylene or alkenylene group].
Since the cyclohexenone long chain alcohol of formula (1) improves diabetic vascular smooth muscle contraction and bronchial smooth muscle contraction, it is useful as a preventive and/or therapeutic agent for a diabetic vascular disorder or a respiratory disorder.
The present invention is related to compounds of structure (I) as heme oxygenase 1 (HMOX 1) inducers.
The present invention is also related a method of controlling the activity or the amount, or both the activity and the amount, of heme-oxygenase 1 in a mammalian subject. The definitions of the variables are provided herein.