Efficient methods for the preparation of acetylenic ketones
作者:H.D. Verkruijsse、Y.A. Heus-Kloos、L. Brandsma
DOI:10.1016/0022-328x(88)80002-0
日期:1988.1
A number of acetylenicketones RCCC(O)R′ have been obtained in good yields from lithiated acetylenes RCCLi and acetic anhydride, N,N-dimethylacetamide, or N,N-dimethylbenzamide. The most convenient and general method consists of treating alkynylzinc chlorides with acid halides R′C(O)Cl. Benzoyl chloride (R′ = Ph), acryloyl chloride (R′ = CH2CH), and butynoyl chloride (R′ = C2H5CC) react only
从锂化乙炔RC CLi和乙酸酐,N,N-二甲基乙酰胺或N,N-二甲基苯甲酰胺以良好的产率获得了许多炔酮RC = CC(= O)R′ 。最方便,最通用的方法是用酰基卤R'C(= O)Cl处理炔基氯化锌。苯甲酰氯(R'= Ph),丙烯酰氯(R'= CH 2 = CH )和丁酰氯(R'= C 2 H 5 C = C )仅在催化量的Pd [P(P( Ph)3 ] 4。
Butyllithium-induced dimerization of pent-3-en-1-yne and related additions
作者:P.A.A. Klusener、H. Hommes、J.C. Hanekamp、A.C.H.T.M. van der Kerk、L. Brandsma
DOI:10.1016/0022-328x(91)86132-a
日期:1991.5
The enynes HCCCHCHCH2R (R H, Me, OMe, NMe2 SMe), are converted into dimers by treatment with slightly more than two equivalent of butyllithium. The Zconfiguration predominates in the dimers obtained after aqueous workup. The lithiated enynes (R H, Me, SMe) and acetylenic compounds LiCCCH2R (R SMe, C6H5) add in an analogous way to the double bond of LiCCCHCH2.
Insect pheromones and their analogues. IX. Stereospecific synthesis of (Z)-dodeca-9,11-dienyl acetate, a component of the sex pheromone of the cotton bollworm mothDiparopsis cactanea
作者:G. G. Balezina、G. Yu. Ishmuratov、V. N. Odinokov、F. A. Selimov、U. M. Dzhemilev、G. A. Tolstikov
DOI:10.1007/bf00575767
日期:——
A method has been developed for the stereospecific synthesis of (Z)-dodeca-9,11-dienyl acetate, a component, together with the corresponding (E) isomer, of the sex pheromone of the red cotton bollworm moth, that is based on the coupling of vinylacetylene with either 8-hydroxyoctanal or 8-bromooctan-1-ol to form a C12 enynic compound in which the acetylenic bond is then reduced stereospecifically with
Nickel-catalyzed intramolecular [4+4] cycloadditions. 4. Enantioselective total synthesis of (+)-asteriscanolide
作者:Paul A. Wender、Nathan C. Ihle、Carlos R. D. Correia
DOI:10.1021/ja00225a055
日期:1988.8
Le (+)-asteriscanolide est synthetise par cycloaddition intramoleculaire de la (dihydro-2,5 trimethyl-1',1',5' hexadiene-3',5'yl-5 vinyl-3) furannone-2 qui est preparee en partant de l'acroleine
Le (+)-asteriscanolide est 合成 par cycloaddition intramoleculaire de la (dihydro-2,5 trimethyl-1',1',5' hexadiene-3',5'yl-5vinyl-3) furannone-2 qui est preparee en丙烯醛
2-ALKENYL CARBINOLS FROM 2-HALO KETONES: 2-E-PROPENYLCYCLOHEXANOL