Producción Científica Profesorado

New 3,3?[2,2?-oxy-bis-(oxazaborolidine)]-ethylenes. Structural studies by NMR, X-ray, and quantum chemistry methods



Tlahuextl Romero, Angela Margarita

2005

Margarita Tlahuextl*, Antonio R. Tapia-Benavides, Angelina Flores-Parra, Rosalinda Contreras, Hugo Tlahuext, Elso M. Cruz, New 3,3-[2,2-oxy-bis-(oxazaborolidine)]ethylenes. Structural studies by NMR, X-ray, and quantum chemistry methods, Heteroatom Chemistry, 16, 513-519 (2005). DOI: 10.1002/hc.20151


Abstract


3,3?-[2,2?-Oxy-bis-(4S-methyl, 5R-phenyl-1,3,2-oxazaborolidine)]ethylene (4a) and 3,3?-[2, 2?-oxy-(4S-methyl-5R-phenyl-1,3,2-oxazaborolidine)- (1,3,2-benzoxazaborolidine)]ethylene (4b) were synthesized by the reaction of N,N?-bis-[(1R,2S)-norephedrine]oxalyl (3a) or N,N?-[((1R,2S)-norephedrine, o-hydroxyphenylamine]oxalyl (3b) with BH3-THF. The molecular structure of these compounds was established by NMR and infrared spectroscopy. The molecular geometry for 4 was studied by means of theoretical methods, resulting in structures that were in total agreement with those obtained by spectroscopy data and X-ray diffraction.



Producto de Investigación




Artículos relacionados

SYNTHESES, NMR STUDY AND STEREOCHEMISTRY OF NEW P-H TRICYCLOPHOSPHORANES

Synthesis and structural studies of N-(p-toluenesulfonyl)-amino acid 3,5-di-tert-butyl-2-phenolamide...

Hydrogen bond studies in substituted N-(2-hydroxyphenyl)--2-[(4-methylbenzenesulfonyl)amino]acetamid...

Structural studies of spiroarsoranes derived from 2-aminophenols

trans-Bis[2-(aminomethyl)-1H-benzimidazole-2N2,N3]aquacopper(II) dichloride dihydrate

Addition reactions of protonic reagents to optically active 2-phenyl-1,3,2-oxazaborolines

New 3,3?[2,2?-oxy-bis-(oxazaborolidine)]-ethylenes. Structural studies by NMR, X-ray, and quantum ch...

Three-center intramolecular hydrogen bonding in oxamide derivatives. NMR and X-ray diffraction study

Synthesis and structural studies of new N-(p-toluenesulfonyl)amino acid o-phenolamides

Synthesis and structural studies of new N-(p-toluenesulfonyl)amino acid o-phenolamides