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

✍ Scribed by Margarita Tlahuextl; Antonio R. Tapia-Benavides; Angelina Flores-Parra; Rosalinda Contreras; Hugo Tlahuext; Elso M. Cruz

Publisher: John Wiley and Sons
Year: 2005
Tongue: English
Weight: 144 KB
Volume: 16
Category: Article
ISSN: 1042-7163
DOI: 10.1002/hc.20151

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✦ Synopsis

nyl-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 BH 3 -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.

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