Reduction selective par le borohydrure de sodium d'un groupe ester ou nitrile dans les epoxydes gem disubstitues par deux croupes attracteurs d'electrons
A One Pot Synthesis of 3α-Halohydrazides From α,α-Dicyano-Epoxides
作者:P. Legrel、M. Baudy-Floc'h、A. Robert
DOI:10.1055/s-1987-27929
日期:——
A convenient and efficient new synthesis of α-halohydrazides from gem-dicyano expoxides is described.
描述了一种方便高效的新合成方法,从gem-二氰基环氧化物中合成α-卤代肼。
Synthesis and characterization of stable 2-cyano-2-carboximidic acid alkyl ester-oxiranes and 2, 2-dicarboximidic acid dialkyl ester-oxiranes
作者:Dominique Hurtaud、Michèle Baudy-Floc'h、Philippe Le Grel
DOI:10.1016/s0040-4039(99)00918-1
日期:1999.7
Bases catalyse the addition of primary alcohols on dicyano oxiranes to afford stable imidates. Depending on the catalyst it is possible to obtain either a mixture of Z and E monoimidates 5 in 3 to 1 ratio (NEt3) or the Eimidate in 95% (BrNBu4), or the bisimidates 6 (NaOMe).
Simple selective reduction by sodium borohydride of an ester or a cyano group of α-cyano epoxides
作者:Jacques Mauger、Albert Robert
DOI:10.1039/c39860000395
日期:——
Sodiumborohydridereduced the estergroup of epoxide (1) or one cyano group of (2) selectively within 5 min to give new hydroxy- or amino-functionalized epoxides.
Enhanced reactivity of η1-allyl ligands in trialkylphosphite substituted CpFe(Co)2(η1-allyl) complexes
作者:Myron Rosenblum、Paul S. Waterman
DOI:10.1016/s0022-328x(00)81795-7
日期:1980.3
contrast to Ia or Ib. CpFe(CO)2(η1-2-butenyl) and CpFe(CO)2(η1-cyclopentyl) fail to undergo photochemically initiated CO substitution in the presence of phosphite III, but give instead the dinuclear complex Cp2Fe2(CO)3(L) (L = III). The complex CpFe(CO)2(η1-cyclopentenyl) (VIII) can, however, be prepared indirectly from IIb → VI → VII → VIII. Complex IIa is 900 times more reactive than Ia cycloaddition