Ed sequentially in 50 , 60 , 70 , 80 , 90 , and 100 ethanol for 30 min each after which dried in 100 hexamethyldisilazane (HMDS). The dried samples…
Secondary alcohols can be prepared in high enantiomeric excess by catalytic hydrogenation of ketones. Zhaoguo Zhang of Shanghai Jiaotong University has established (Org. Lett. 2007, 9, 5613. DOI: 10.1021/ol702565x)that β-keto…
Several methods have been reported for the stereocontrolled preparation of pyrrolidine and piperidine derivatives. Alison J. Frontier of the University of Rochester has observed (Org. Lett. 2007, 9, 4939.DOI: 10.1021/ol701962w)that…
As alkene metathesis has developed into one of the tools of organic synthesis, many practical questions have arisen. Mc-Val-Cit-PABC-PNP supplier In the course of a synthesis (Org. Lett. 2007, 9,…
Although the enantioselective oxidation of alkyl aryl sulfides is well developed, much less is known about dialkyl sulfides. Tsutomu Katsuki of Kyushu University has designed (J. Am. Chem. Soc. PMID:26446225…
François Morvan of the Université de Montpellier, using the inexpensive dimethyl phosphite, optimized (Tetrahedron Lett. 2008, 49, 3288. DOI: 10.1016/j.tetlet.2008.03.079)the free radical reduction of 1 to 2. BuycataCXium Pd G4…
Powerful methods for catalytic, enantioselective intermolecularDiels-Alder reactions have been developed. Ben L. Feringa and Gerard Roelfes of the University of Groningen have shown (Org. PMID:23453497 Lett. 2007, 9, 3647. DOI:…
Oxygenated secondary stereogenic centers are readily available. There is a limited range of carbon nucleophiles that will displace a secondary leaving group in high yield with clean inversion. Teruaki Mukaiyama…
Alkenes are usually reduced by catalytic hydrogenation. Diimide reduction is a mild and neutral alternative. Keith R. Buszek, now at the University of Missouri, Kansas City, has shown (J. Org.…
The power of catalytic C-H functionalization is illustrated by the elegant synthesis of rhazinicine (3) devised (Angew. Chem. PMID:34235739 Int. Ed. 2008, 47, 3004. DOI: 10.1002/anie.200705005)by Matthew J. Propargyl-PEG1-NHS ester…
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