Irradiation of α-iodo ketone in hexane under a nitrogen atmosphere with a high-pressure mercury lamp (λ>300nm) at room temperature afforded the corresponding α,β-unsaturatedketones in good yield. This reaction affords a new, clean and convenient synthetic method for the α,β-unsaturatedketone.
Photo-Cleavage of Carbon-Carbon Bond of<b><i>α</i></b>-Iodocycloalkanones Giving<b><i>ω</i></b>,<b><i>ω</i></b>-Dialkoxyalkanoic Ester in Alcohol
作者:Shun-Jun Ji、C. Akira Horiuchi
DOI:10.1246/bcsj.73.1645
日期:2000.7
The irradiation at λ > 300 nm of α-iodocycloalkanones with a high-pressure mercury lamp in alcohols containing a small amount of water afforded the corresponding ω,ω-dialkoxyalkanoic ester (65—88%) by photochemical cleavage of the C(I)-C=O bond at room temperature. In the case of a commercial fluorescent lamp as the irradiating light source, photochemical ring-opening products were also obtained. The irradiation of 2α-iodo-5α- and 4β-iodo-5β-cholestan-3-ones in methanol gave methyl 2,2-dimethoxy-2,3-seco-5α-cholestan-3-oate and methyl 4,4-dimethoxy-3,4-seco-5β-cholestan-3-oate in 78 and 62% yields, respectively. The photochemical behavior of the cleavage reaction of α-iodocycloalkanones is also discussed on the basis of 2-hydroxycycloalkanone as an intermediate.
COMPOUNDS AND METHODS TO INHIBIT OR AUGMENT AN INFLAMMATORY RESPONSE
申请人:Grainger J. David
公开号:US20080045557A1
公开(公告)日:2008-02-21
Isolated and purified chemokine peptides, variants, and derivatives thereof, as well as chemokine peptide analogs, are provided.
提供了分离和纯化的趋化因子肽、变体及其衍生物,以及趋化因子肽类似物。
METHODS TO INHIBIT OR AUGMENT AN INFLAMMATORY RESPONSE
申请人:Grainger David J.
公开号:US20120065401A1
公开(公告)日:2012-03-15
Isolated and purified chemokine peptides, variants, and derivatives thereof, as well as chemokine peptide analogs, are provided.
本发明提供了分离和纯化的趋化因子肽、变体和衍生物,以及趋化因子肽类似物。
Synthesis of β-substituted α-iodo cycloalkanones by the CuI-mediated conjugate addition of Grignard reagents to α-iodo cycloalkenones
作者:Chin-Kang Sha、Chen-Tso Tseng、Wen-Sheng Chang
DOI:10.1016/s0040-4039(00)02016-5
日期:2001.1
CuI-mediated conjugate addition of Grignard reagents to alpha -iodo cycloalkenones afforded beta -substituted alpha -iodo cycloalkanones in good to excellent yields. (C) 2001 Elsevier Science Ltd. All rights reserved.