Cyanation of various alcohols by a new type of oxidation–reduction condensation is described. Primary alkyl diphenylphosphinites, 2,6-dimethyl-1,4-benzoquinone (DMBQ), and diethyl cyanophosphonate ...
Iron-Catalyzed Reductive Vinylation of Tertiary Alkyl Oxalates with Activated Vinyl Halides
作者:Yang Ye、Haifeng Chen、Ken Yao、Hegui Gong
DOI:10.1021/acs.orglett.0c00561
日期:2020.3.6
of vinylated allcarbonquaternary centers via Fe-catalyzed cross-electrophile coupling of vinyl halides with tertiary alkyl methyl oxalates. The reaction displays excellent functional group tolerance and broad substrate scope, which allows cascade radical cyclization and vinylation to afford complex bicyclic and spiral structural motifs. The reaction proceeds via tertiary alkyl radicals, and the putative
DTBB-Catalysed dilithiation of styrene and its methyl-derivatives: introduction of two electrophilic reagents
作者:Miguel Yus、Pedro Martı́nez、David Guijarro
DOI:10.1016/s0040-4020(01)01063-8
日期:2001.12
Pr2CO], in THF, at temperatures ranging from −78 to 0°C, gave, after hydrolysis, products 2 resulting from addition of lithium to the olefinic double bond and successive trapping with the electrophilicreagent. When a carbonyl compound was used as electrophile, mixtures of the monoaddition–reduction compounds 3 and 4 were obtained as by-products, which could be easily separated from the diaddition
Highly regioselective reaction of zirconocene-alkene complexes with aldehydes or ketones
作者:Noriyuki Suzuki、Christophe J. Rousset、Koichiro Aoyagi、Martin Kotora、Tamotsu Takahashi、Maki Hasegawa、Yu Nitto、Masahiko Saburi
DOI:10.1016/0022-328x(94)80112-6
日期:1994.6
Reactions of zirconocene-alkene complexes Cp2Zr(CH2CHR)(PR′3) (R H, Me, Et, SiR″3 or Ar) with aldehydes or ketones were investigated. Zirconocene-ethylene, -propylene or 1-butene complexes reacted with aldehydes or ketones at terminal carbons of alkenes to give the corresponding alcohols after hydrolysis with a high regioselectivity. A similar type of reaction product was also obtained by a reaction