1997 July - 4 articles
A convenient one-step synthesis of 2,2-dimethylchromans and chromenes using Amberlyst 15 as a catalyst is described.
The conformation of dimethyl (R,R)-tartrate has been analyzed on the basis of the single crystal X-ray diffraction method as well as by ab-initio quantum chemical studies. The results showed that the extended T conformation containing two planar hydr...
The amide 2 [1] was prepared by hydrolysis of the nitrile 1 according to the reported procedure [2] [...]
To a cooled (0[infinity]C) solution of 1 (0.68 g, 2.76 mmol) in CH2Cl2 (2 ml) was added successively hydrogen peroxide (30%, 1.29 ml), tetra-(n-butyl)ammonium hydrogen sulfate (187 mg) and an aqueous solution of sodium hydroxide (20%, 1.03 ml).[...]
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