Organic photochemistry in the far-ultraviolet: unusual wavelength dependence in solution-phase irradiations
作者:Ra Srinivasan、Thomas Baum、Karen Brown、Jose Ors、Lloyd S. White、Angelo R. Rossi、Gary A. Epling
DOI:10.1039/c39810000973
日期:——
In the region from 185 to 215 nm certain compounds show extreme selectivity in their photodecomposition modes in solution depending on the wavelength even though such compounds possess only one intense absorption in this region.
Stereochemistry of Dehydrogenation of 1,4,-Cyclohexadiene with 2,3-Dichloro-5,6-dicyano-<i>p</i>-benzoquinone
作者:Paul Müller、Daniel Joly、François Mermoud
DOI:10.1002/hlca.19840670113
日期:1984.2.1
cis- and trans-(3,6-D2)-1,4-cyclohexadienes 1a and 1b have been synthesized from cis-3,4-dichlorocyclobutene (5). Aromatization to benzene with DDQ is cis-stereospecific with an uncertainty of 5%. This result is discussed in relation to concerted or stepwise mechanisms for aromatization of 1,4-dihydroaromatics with 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ).
The recent surge in the applications of deuterated drug candidates has rendered an urgent need for diverse deuterium labeling techniques. Herein, an efficient Rh-catalyzed deuterated Tsuji–Wilkinson decarbonylation of naturally available aldehydes with D2O is developed. In this reaction, D2O not only acts as a deuterated reagent and solvent but also promotes Rh-catalyzed decarbonylation. In addition
最近氘代候选药物的应用激增,迫切需要各种氘标记技术。在此,开发了一种高效的 Rh 催化的氘代 Tsuji-Wilkinson 用 D 2 O 对天然可用的醛进行脱羰反应。在该反应中,D 2 O 不仅充当氘代试剂和溶剂,而且还促进 Rh 催化的脱羰。此外,从 α,β-不饱和醛合成末端单氘代烯烃的脱羰策略也触手可及。
Notes - Substitution of Halogens by Deuterium in Organic Compounds Without Undesired Exchange of Hydrogen by Deuterium