The Journal of organic chemistry, 72(26), 10276-10278 (2007-11-29)
Copper-catalyzed [4 + 1] cycloaddition reaction of alpha,beta-acetylenic ketones with alpha-diazo esters offers an efficient, direct route to highly substituted furans. The reaction conditions and the scope of the process are examined, and a possible mechanism is proposed.
Journal of the American Chemical Society, 131(5), 1674-1675 (2009-02-05)
Magnesium-catalyzed enantioselective aldol between ethyl diazoacetate and aromatic, aliphatic, and alpha,beta-unsaturated aldehydes affords alpha-diazo-beta-hydroxy-esters in high enantioselectivities. Aldol adducts resulting from this asymmetric transformation are versatile intermediates toward the synthesis of several ester containing chiral building blocks.
The Journal of organic chemistry, 76(8), 2465-2470 (2011-03-19)
The performance of recently reported highly cis-diastereoselective Rh(I) cyclopropanation catalysts has been significantly improved by a systematic study of different reaction parameters (catalyst activation, solvent, temperature, stoichiometry). The catalyst efficiency and diastereoselectivity were enhanced by changing the activating agent from
The Journal of organic chemistry, 69(7), 2431-2435 (2004-03-31)
Vitamin B(12) derivatives were found for the first time to be general and efficient catalysts for asymmetric cyclopropanation of alkenes with ethyl diazoacetate (EDA). Among several common derivatives, aquocobalamin (B(12a)) was shown to be the most effective catalyst for a
Chemical communications (Cambridge, England), (19)(19), 2045-2047 (2006-06-13)
A number of cationic gold(I) complexes have been synthesized and found to be stabilized by the use of N-heterocyclic carbene ligands. These species are often employed as in situ-generated reactive intermediates in gold catalyzed organic transformations. An isolated, well-defined species
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![(1R,8S,9s)-Bicyclo[6.1.0]non-4-yn-9-ylmethanol for Copper-free Click Chemistry](/deepweb/assets/sigmaaldrich/product/structures/171/632/0556139a-2db5-4678-a6ec-a26a693fd574/640/0556139a-2db5-4678-a6ec-a26a693fd574.png)
