AN ALDOL-TYPE REACTION OF ACETONITRILES USING DIALKYLBORYL TRIFLATE
作者:Hiroshi Hamana、Tsutomu Sugasawa
DOI:10.1246/cl.1982.1401
日期:1982.9.5
Acetonitriles and benzaldehydes react in the presence of dialkyl boryl triflate and diisopropylethylamine in dichloromethane to give the corresponding aldol-type products in good yields under mild conditions.
Synthesis of<i>β</i>-Hydroxy Nitriles via Indium-Induced Coupling of Bromoacetonitrile with Carbonyl Compounds
作者:Shuki Araki、Masafumi Yamada、Yasuo Butsugan
DOI:10.1246/bcsj.67.1126
日期:1994.4
The organoindium reagent, derived from indium metal and bromoacetonitrile, reacted with carbonyl compounds in the presence of chlorotrimethylsilane to give, after hydrolysis, β-hydroxy nitriles. The coupling proceeded with high chemoselectivity, though the diastereoselectivity was low.
Tin-mediated Organic Reactions: a Practical Method for the Synthesis of β-Hydroxynitriles and β-Hydroxyketones
作者:Peipei Sun、Baochuan Shi
DOI:10.1039/a809418g
日期:——
In the presence of chlorotrimethylsilane, the tin mediated addition of bromoacetonitrile or α-bromacetophenone to aldehydes in THF gives β-hydroxynitriles or β-hydroxyketones in moderate to good yields.
Addition of stannylated carboxylic acid derivatives to the carbonyl group of aldehydes
作者:A.N. Kashin、M.L. Tulchinsky、I.P. Beletskaya
DOI:10.1016/0022-328x(85)87335-6
日期:1985.9
Adducts obtained in high yield in these reactions readily undergo hydrolysis (when treated with aqueous KF) and acetolysis (when treated with AcCl) with quantative formation of 3-hydroxy and 3-acetoxy derivatives of esters, nitriles and amides. We show that interaction of Et3SnCH2COOEt with the above-mentioned aldehydes and isovaleraldehyde in the presence of equimolar amounts of Et4NCl in CH2Cl2/HMPTA ()
Enhanced enantioselectivity of an enzymatic reaction by the sulfur functional group. A simple preparation of optically active .beta.-hydroxy nitriles using a lipase
The enantioselectivity of a lipase-catalyzed hydrolysis was improved by varying the acyl residue into the sulfur functional one, i.e. the beta-(phenylthio)- or beta-(methylthio)acetoxy group, from acetate or valerate to realize satisfactory resolution of beta-hydroxy nitriles using lipase P (Pseudomonas sp.).