X-ray crystallographic determination of the stereochemistry of a unique chiral olefin, [CD(-)238.0]-(3R,3'R)-(P,P)-(Z)-(+)-1,1',2,2',3,3',4,4'-Octahydro-3,3'-dimethyl -4,4'-biphenanthrylidene

Enantiomer

Volumn 3, Issue 3, 1998, Pages 251-253

  Koumura, Nagatoshi ^a   Harada, Nobuyuki ^a  

^a TOHOKU UNIVERSITY   (Japan)

Author keywords

3,3' Dimethyl 4,4' biphenanthrylidene; Absolute stereochemistry; Chiral olefin; Internal reference of absolute configuration; X ray analysis

Indexed keywords

ALKENE; METHYL GROUP; PHENANTHRENE DERIVATIVE;

ARTICLE; CHIRALITY; PRIORITY JOURNAL; STEREOCHEMISTRY; X RAY CRYSTALLOGRAPHY;

EID: 0031772502     PISSN: 10242430     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (5)

1. N. Harada, A. Saito, N. Koumura, H. Uda, B. de Lange, W.F. Jager, H. Wynberg and B.L. Feringa, J. Am. Chem. Soc. 1997, 119, 7241-7248.
2. N. Harada, A. Saito, N. Koumura, D.C. Roe, W.F. Jager, R.W.J. Zijlstra, B. de Lange and B.L. Feringa, J. Am. Chem. Soc. 1997, 119, 7249-7255.
3. N. Harada, N. Koumura and B.L. Feringa, J. Am. Chem. Soc. 1997, 119, 7256-7264.
4. N. Harada, N. Koumura and M. Robillard, Enantiomer 1997, 2, 303-309.
5. w = 0.0697. The absolute helicity of [CD(-)238.0]-(Z)-(+)-4 could be definitely determined to be (P,P) by the internal reference method using the known absolute configuration of two methyl groups.