2-Cyano-.DELTA.3-piperidines. V. Towards the synthesis of corynanthe-type indole alkaloids. Computer-assisted study of the conformations of an "inside" indoloquinolizidine series
Stereospecific palladium-catalyzed 1,4-acetoxychlorination of 1,3-dienes
作者:Jan-E. Bäckvall、Ruth E. Nordberg、Jan-E. Nyström
DOI:10.1016/s0040-4039(00)87173-7
日期:1982.1
Palladium-catalyzed oxidation of 1,3-dienes in acetic acid in the presence of LiCl and LiOAc produces 1-acetoxy-4-chloro-2-alkenes in high selectivity. The 1,4-adducts were stereo- and regioselectively functionalized.
acetates and sodiodimethylmalonate proceeds in high yields and enantioselectivities (up to 99% ee) using a diphenylphosphinoaryl oxazoline ligand. The so-formed substitution products are transformed into enantiomerically enriched succinicacids and also into enantiomerically enriched γ-lactones.
Regio- and stereocontrolled functionalization of cycloheptadiene using organoiron and organoselenium chemistry
作者:Anthony J. Pearson、Sandra L. Kole、Tapan Ray
DOI:10.1021/ja00332a050
日期:1984.10
Etude des complexes cycloheptadienyl-fer carbonyles: reactivite, conformation, enlevement du metal et cyclofonctionalisation desdienes obtenus
Etude des complexes cycloheptadienyl-fer carbonyles:reactivite,conformation,enlevement du metal et cyclofonctionalisation des diene obtenus
A Mild Anionic Method for Generating <i>o-</i>Quinone Methides: Facile Preparations of <i>Ortho</i>-Functionalized Phenols
作者:Ryan M. Jones、Ryan W. Van De Water、Christopher C. Lindsey、Christophe Hoarau、Thay Ung、Thomas R. R. Pettus
DOI:10.1021/jo001752e
日期:2001.5.1
A low-temperature method for generating o-quinone methides is described which permits facile introduction of assorted R substituents onto the aryl ring system at low temperature. The method is useful for the efficient preparation of ortho-ring-alkylated phenols.
Aza-Diels–Alder reactions and synthetic applications of thio-substituted 1,3-dienes with arylsulfonyl isocyanates
作者:Shang-Shing P. Chou、Chia-Cheng Hung
DOI:10.1016/s0040-4039(00)01447-7
日期:2000.10
The first aza-Diels–Alder reactions of arylsulfonylisocyanates with thio-substituted 1,3-dienes via the 3-sulfolene precursors 1 gave the cyclized products 3 with complete control of regio- and chemoselectivity. The cyclized products 3a and 4 underwent further interesting reactions with nucleophiles and bases to give useful heterocyclic compounds.