Remote Control of Regio- and Diastereoselectivity in the Hydroformylation of Bishomoallylic Alcohols with Catalytic Amounts of a Reversibly Bound Directing Group
作者:Christian U. Grünanger、Bernhard Breit
DOI:10.1002/anie.200905949
日期:2010.1.25
Remote and reversible! Phosphinites serve as reversiblybounddirectinggroups for the remotecontrol of the regio‐ and diastereoselectivehydroformylation of bishomoallylicalcohols (see scheme; r.r: regioisomer ratio). The distance between the double bond and the functional hydroxy group to which the directinggroup is reversiblybound is the longest ever reported.
A rationale of diastereofacial selection in the alkylation of endocyclic enolates with chirality at the β-position
作者:Kiyoshi Tomioka、Kōsuke Yasuda、Hisashi Kawasaki、Kenji Koga
DOI:10.1016/s0040-4039(00)84765-6
日期:1986.1
Ratios of the diastereomers 4 and 5 in the alkylation of the endocyclicenolates 3 with chirality at the β-position were highly dependent on the steric bulkiness of R1 and R2. It was clarified that, when the allylic strain considerations are acknowledged in 3, the diastereofacial selection is successfully rationalized by evaluating two competitive 1,2-asymmetric inductions in the conformation 15.
Diastereoselective .alpha. allylation of secondary and tertiary thioamides via thio-Claisen rearrangement. A structural proof of Z secondary thioamide dianions and Z tertiary thioamide anions
作者:Y. Tamaru、Y. Furukawa、M. Mizutani、O. Kitao、Z. Yoshida
DOI:10.1021/jo00169a003
日期:1983.10
Ozegowski, Ruediger; Kunath, Annamarie; Schick, Hans, Liebigs Annalen, 1996, # 9, p. 1443 - 1448
作者:Ozegowski, Ruediger、Kunath, Annamarie、Schick, Hans