Polynitrogen strong bases: 1-new syntheses of biguanides and their catalytic properties in transesterification reactions
作者:Georges Gelbard、Florence Vielfaure-Joly
DOI:10.1016/s0040-4039(98)00300-1
日期:1998.4
A new and convenient method has been developed for the synthesis of soluble and polystyrene-supported biguanides by the nucleophilic addition of guanidines such as TMG and TDB to diisopropyl-, dicyclohexyl- and polymericarbodi-imide. These biguanides are excellent catalysts for the transesterification.
Reactivity and Structural Diversity in the Reaction of Guanidine 1,5,7-Triazabicyclo[4.4.0]dec-5-ene with CO<sub>2</sub>
, CS<sub>2</sub>
, and Other Heterocumulenes
作者:Niklas von Wolff、Claude Villiers、Pierre Thuéry、Guillaume Lefèvre、Michel Ephritikhine、Thibault Cantat
DOI:10.1002/ejoc.201601267
日期:2017.1.18
and p-tolylNCS to give three types of products: TBD–CO2 (1) and TBD–p-tolylNCS (5), resulting from the addition of the cumulene to TBD, TBD(–H)(iPrNH}–C=NiPr}) (3) and TBD(–H)(p-tolylNHCO) (4), resulting from addition of the N–H bond of TBD to the C=N bond of the cumulene, and the dithiocarbamate salt [TBDH][TBD(–H)CS2] (2) after transfer of a proton to a second molecule of TBD. Competition reactions