A Facile Synthesis of Natural Products Chaetomellic Acid A and 1,7(<i>Z</i>)- Nonadecadiene-2,3-dicarboxylic Acid<sup>,</sup>
作者:Anirban Kar、Narshinha P. Argade
DOI:10.1021/jo020195o
日期:2002.10.1
Synthesis of recently isolated bioactive natural products chaetomellic acid A anhydride (1) and a novel 1,7(Z)-nonadecadiene-2,3-dicarboxylic acid (2) have been described. Chemoselective carbon[bond]carbon S(N)2' coupling reactions of appropriate Grignard reagents with dimethyl bromomethylfumarate (7) in diethyl ether in the presence of HMPA at room temperature furnished the corresponding diesters
Conversion of Bromoalkenes into Alkynes by Wet Tetra-<i>n</i>-butylammonium Fluoride
作者:Masaru Okutani、Yuji Mori
DOI:10.1021/jo802101a
日期:2009.1.2
Tetra-n-butylammonium fluoride was found to be a mild and efficient base for the elimination reaction of bromoalkenes. Treatment of 1,1-dibromoalkenes, (Z)-1-bromoalkenes, and internal bromoalkenes with 5 equiv of TBAF center dot 3H(2)O in DMF yielded terminal and internal alkynes in high yields without undue regard to the presence of water.
CI(NO) spectra ofn-Alkyn-1-ols1
作者:A. Brauner、H. Budzikiewicz
DOI:10.1002/oms.1210180803
日期:1983.8
Abstractn‐Alkyn‐1‐ols show fragmentation patterns which are influenced by the length of the chain and by the relative positions of the hydroxyl group and triple bond, and which allow a localization of the site of unsaturation.
164. Syntheses of long-chain acids. Part VI. Acetylenic acids and cis,cis-docosa-5,13-dienoic acid