Trimethylorthoformate: A mild and effective dehydrating reagent for solution and solid phase imine formation
摘要:
Trimethylorthoformate has been found to be an effective dehydrating solvent for the formation of imines, both in the solid phase as well as solution phase.
4-addition and [3 + 2] cycloaddition reactions using chiral calcium species prepared from calcium isopropoxide and chiral bisoxazoline ligands have been developed. Glycine Schiff bases reacted with acrylic esters to afford 1,4-addition products, glutamic acid derivatives, in high yields with high enantioselectivities. During the investigation of the 1,4-addition reactions, we unexpectedly found that a [3
Chemoselective reduction of functional groups in the presence of esters is observed with tetrabutylammonium borohydride in chloro solvents.
在氯化溶剂中,使用四丁基铵硼氢化物可以观察到在酯类存在下的官能团化学选择性还原。
Phosphorus-containing Aminocarboxylic Acids: XIV. Synthesis of Analogs of α-Substituted Glutamic Acid
作者:I. V. Saratovskikh、V. V. Ragulin
DOI:10.1007/s11176-005-0371-2
日期:2005.7
Addition of Schiff bases derived from amino acid esters to appropriate vinylphosphoryl compounds, followed by hydrolysis of the adducts formed gives a series of new α-alkylated phosphorus-containing α-aminocarboxylic acids, viz. phosphonic and phosphinic analogs of glutamic acid.
A novel route to dipeptide and its derivative by means of the palladium catalyzed facile cleavage of 1-(1-methoxycarbonyl)alkyl-3-substituted-4-arylazetidin-2-ones
作者:Iwao Ojima、Shigemi Suga、Rumiko Abe
DOI:10.1016/0040-4039(80)80213-9
日期:1980.1
1-(1-Methoxycarbonyl)alkyl-3-substituted-4-arylazetidin-2-ones were found to be cleaved exclusively at the NC4 bond by the hydrogenolysis on palladium catalyst to give the corresponding dipeptide and its derivative in excellent yields.