From Phenols to Azulenes: An Extended and Versatile Route to Polyalkylated Azulenes with Variable Substitution Patterns at the Seven- and Five-membered Ring
Synthesis and reactivity of cis-dichloro(enamine)(amine)platinum(II) complexes
作者:Sheryl L. Doran、David B. Brown、Christopher W. Allen
DOI:10.1016/0022-328x(88)80558-8
日期:1988.2
The reaction of Zeise's dimer, trans-μ-dichlorobis(ethylene)platinum(II) chloride, with a variety of alkyl-substituted enamines led to complexes of the type cis-[Pt(C(2)-enamine)(amine)Cl2], where the enamine ligand is coordinated to the platinum(II) center through its nucleophilic carbon atom (C(2)) and the amine ligand is derived from the parent enamine. Analogous palladiumcomplexes were prepared
PROCESS FOR THE PREPARATION OF 2-TRIFLUOROMETHYL-5-(1-SUBSTITUTED)ALKYLPYRIDINES
申请人:Bland Douglas C.
公开号:US20100004457A1
公开(公告)日:2010-01-07
2-Trifluoromethyl-5-(1-substituted)alkylpyridines are produced efficiently and in high yield from an alkyl vinyl ether and trifluoroacetyl chloride by cyclization.
Alkylation of several enamines by phenacyl or p-bromophenacyl bromide oxime affords the corresponding alkylated immonium salts III. Mild hydrolysis of these salts in most cases yields the unknown 6-hydroxy-4,5-dihydro-1,2,4H-oxazines (VI). Spectroscopic observation shows that some of these compounds exist in solution only in the cyclic form, some in a ring-chain tautomeric equilibrium with the corresponding
Phosphoric Acid Catalyzed Desymmetrization of Bicyclic Bislactones Bearing an All-Carbon Stereogenic Center: Total Syntheses of (−)-Rhazinilam and (−)-Leucomidine B
the presence of a catalytic amount of an imidodiphosphoric acid, enantioselective desymmetrization of bicyclicbislactones by reaction with alcohols took place smoothly to afford enantiomerically enriched monoacids having an all‐carbon stereogeniccenter. Concise catalytic enantioselective syntheses of both (−)‐rhazinilam and (−)‐leucomidine B were subsequently developed using (S)‐methyl 4‐ethyl‐4‐formylpimelate
1,3-Dipolar Cycloaddition Reaction of Vinyl Azides with Enamines. Synthesis of Vinyltriazolines and Vinyltriazoles
作者:Yujiro Nomura、Yoshito Takeughi、Shuji Tomoda、Masato M. Ito
DOI:10.1246/bcsj.54.261
日期:1981.1
Reaction of α- and β-azidostyrene with enamines gave vinyltriazolines regioselectively in moderate yields. 1-Pyrrolidinyl enamines reacted with α-azidostyrene more readily than piperidino or morpholino enamines. β-Azidostyrene was as reactive as azidobenzene while α-azidostyrene was much less reactive. Vinyltriazolines formed from enamines of ketones were deaminated to yield the corresponding vinyltriazoles