منابع مشابه
γ-Selective Allylation of (E)-Alkenylzinc Iodides Prepared by Reductive Coupling of Arylacetylenes with Alkyl Iodides.
The first examples of Cu-catalyzed γ-selective allylic alkenylation using organozinc reagents are reported. (E)-Alkenylzinc iodides were prepared by Fe-catalyzed reductive coupling of terminal arylalkynes with alkyl iodides. In the presence of a copper catalyst, these reagents reacted with allylic bromides derived from Morita-Baylis-Hillman alcohols to give 1,4-dienes in high yields. The reacti...
متن کاملPalladium-catalyzed difluoromethylthiolation of heteroaryl bromides, iodides, triflates and aryl iodides
A palladium-catalyzed difluoromethylthiolation of heteroaryl halides and triflates under mild conditions was described. A vast range of heteroaryl halides such as pyridyl, quinolinyl, benzothiazolyl, thiophenyl, carbazolyl and pyazolyl halides could be difluoromethylthiolated efficiently, thus providing medicinal chemists with new tools for their search of new lead compounds for drug discovery....
متن کاملCreep of Aluminium and Aluminium Alloys
This chapter constitutes an introduction to creep and to the creep response of Aluminium and its alloys. Its major goals are: to provide basic information on creep and its mechanisms to give a description of the more extensively used mathematical relations among creep variables (time, stress and temperature) to illustrate the creep response of pure Aluminium and of Al-Mg alloys to provide a syn...
متن کاملEvidence of aluminium accumulation in aluminium welders.
Using atomic absorption spectrometry the aluminium concentrations in blood and urine and in two iliac bone biopsies obtained from welders with long term exposure to fumes containing aluminium were measured. The urinary excretion of two workers who had welded for 20 and 21 years varied between 107 and 351 micrograms Al/l, more than 10 times the concentration found in persons without occupational...
متن کاملAluminium-containing antiperspirants contribute to aluminium intake
Antiperspirants denote cosmetic products with an anti-perspiration effect which are available as roll-ons, sticks, creams or aerosols (sprays). The anti-perspiration effect is achieved by means of aluminium salts which block the ends of the sweat ducts for a certain amount of time. The safety of aluminium and antiperspirants continues to be critically examined. This is notably true with regard ...
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1915
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.1.2.70