(2-hydroxy)ethyl-thioureas useful as modulators of alpha2B adrenergic receptors
申请人:ALLERGAN SALES, INC.
公开号:US20020161051A1
公开(公告)日:2002-10-31
Compounds of formula (i) and of formula (ii)
1
wherein the symbols have the meaning disclosed in the specification, specifically or selectively modulate &agr;
2B
and/or &agr;
2C
adrenergic receptors in preference over &agr;
2A
adrenergic receptors, and as such are useful for alleviating chronic pain and allodynia and have no or only minimal cardivascular and/or sedatory activity.
Dimethylaluminum chloride catalyzed ene reactions of aldehydes
作者:Barry B. Snider、David J. Rodini、Thomas C. Kirk、Robert Cordova
DOI:10.1021/ja00366a031
日期:1982.1
Formaldehyde Encapsulated in Zeolite: A Long-Lived, Highly Activated One-Carbon Electrophile to Carbonyl-Ene Reactions
作者:Takahiro Okachi、Makoto Onaka
DOI:10.1021/ja039737p
日期:2004.3.3
Gaseous formaldehyde is extremely unstable and readily undergoes self-polymerization to a solid paraformaldehyde or disproportionation to methanol and formic acid in the presence of moisture. We disclose a simple method to stably store such a labile formaldehyde as a monomer in a nanoporous faujasite zeolite at 5 degrees C for at least 50 days without self-polymerization or disproportionation. The greater stability of formaldehyde encapsulated in zeolite was confirmed by 13C MAS NMR spectroscopy. Formaldehyde was not only stabilized within the zeolite cages but functioned as a powerful electrophile toward various olefins. Zeolite-encapsulated formaldehyde was proved to be a stable but highly reactive C1 reagent.
Scandium(III) triflate catalyzed synthesis of primary homoallylic alcohols via carbonyl-ene reaction
作者:Sabera Sultana、Somasekhar Bondalapati、Kiran Indukuri、Paramartha Gogoi、Pipas Saha、Anil K. Saikia
DOI:10.1016/j.tetlet.2013.01.046
日期:2013.3
Scandium trifluoromethanesulfonate can efficiently catalyze the formation of homoallylic alcohols from olefins and paraformaldehyde in good yields. (c) 2013 Elsevier Ltd. All rights reserved.
Reactions of the formaldehyde-trimethylaluminum complex with alkenes