
TY  - JOUR
A1  - Axelsson, O 
A1  - Becker, HD 
A1  - Skelton, BW 
A1  - Sorenson, H 
A1  - White, AH 
T1  - Base-Catalyzed Self-Condensation of Arylacetaldehydes: Molecular Structures of (E)-2,4-Bis(9-Anthryl)but-2-enal and (E)-2,4-Diphenylbut-2-enal
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1988
VL  - 41
IS  - 5
SP  - 727
EP  - 733
KW  - 
UR  - https://doi.org/10.1071/CH9880727 
N2  - Both 9-anthrylacetaldehyde and phenylacetaldehyde undergo stereoselective self-condensation in the presence of base to give (E)- 2,4-di(9-anthryl)but-2-enal (2a), and (E)-2,4-diphenylbut-2-enal (2b) respectively, as established by single-crystal X-ray structure determination. Crystals of (2a) are monoclinic, P21/n, Z 8, a 10.638(9), b 20.68(1), c 20.41(2)&#506;, &#946; 92.36(5)&#176;; R was 0.061 for No 3476 'observed' reflections. Crystals of (2b) are monoclinic, P21/c, Z 4, a 5.781(2), b 23.163(8), c 9.297(5)&#506;, &#946; 91.54(4)&#176;; R 0.037 for No 1174. In both compounds, the enal moiety assumes a virtually planar s-trans conformation, with the angles between the planes of the olefinic double bond and the adjacent aromatic &#960;-system around 70&#176;. 
ER  -

