TY - JOUR
T1 - π-facial selectivity in the formation of tricarbonylchromium(0) complexes of estra-1,3,5(10),6-tetraenes
AU - Dongol, Krishna Gopal
AU - Melo e Silva, M. Cristina
AU - Matsubara, Kouki
AU - Matsumoto, Taisuke
AU - Mataka, Shuntaro
AU - Thiemann, Thies
PY - 2003
Y1 - 2003
N2 - The preparation of two η6-estra-1,3,5(10),6-tetraene tricarbonylchromium complexes 4 and 6 are described. In both cases only one stereoisomer can be isolated, in contrast to other estrane-tricarbonylchromium complexes, where complexations are non-stereoselective. X-ray crystal structural analysis of 4 discloses that only the more sterically hindered β-facial isomer is formed. It is assumed that the 6,7-olefinic moiety exerts a directive influence on the complexation.
AB - The preparation of two η6-estra-1,3,5(10),6-tetraene tricarbonylchromium complexes 4 and 6 are described. In both cases only one stereoisomer can be isolated, in contrast to other estrane-tricarbonylchromium complexes, where complexations are non-stereoselective. X-ray crystal structural analysis of 4 discloses that only the more sterically hindered β-facial isomer is formed. It is assumed that the 6,7-olefinic moiety exerts a directive influence on the complexation.
KW - Alkene
KW - Chromium
KW - Directive effects
KW - Steroids
KW - π-Facial selectivity
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U2 - 10.1002/zaac.200300017
DO - 10.1002/zaac.200300017
M3 - Article
AN - SCOPUS:0038722694
SN - 0044-2313
VL - 629
SP - 945
EP - 947
JO - Zeitschrift fur Anorganische und Allgemeine Chemie
JF - Zeitschrift fur Anorganische und Allgemeine Chemie
IS - 6
ER -