Auxiliary controlled singlet-oxygen ene reactions of cyclohexenes
作者:Werner Fudickar、Katja Vorndran、Torsten Linker
DOI:10.1016/j.tet.2006.07.104
日期:2006.11
The photooxygenation of homochiral cyclohexene ketals, which are easily available from 2-cyclohexenone and l-tartrates, affords hydroperoxides and after reduction the corresponding allylic alcohols in good yields and high regioselectivities. This can be rationalized by electronic repulsions in a perepoxide intermediate and provides evidence for unfavorable 1,3 diaxial interactions with a dioxolane
MASH, EUGENE A.;HEMPERLY, SUSAN B.;NELSON, KEITH A.;HEIDT, PHILIP C.;VAN,+, J. ORG. CHEM., 55,(1990) N, C. 2045-2055
作者:MASH, EUGENE A.、HEMPERLY, SUSAN B.、NELSON, KEITH A.、HEIDT, PHILIP C.、VAN,+
DOI:——
日期:——
MASH, EUGENE A.;NELSON, KEITH A.;HEIDT, PHILIP C., TETRAHEDRON LETT., 28,(1987) N 17, 1865-1868
作者:MASH, EUGENE A.、NELSON, KEITH A.、HEIDT, PHILIP C.
DOI:——
日期:——
Mechanistic studies of diastereoselective cyclopropanation via homochiral ketals. 1. Dioxolane structural effects
作者:Eugene A. Mash、Susan B. Hemperly、Keith A. Nelson、Philip C. Heidt、Shawne Van Deusen
DOI:10.1021/jo00294a016
日期:1990.3
Diastereoselective cyclopropanation via homochiral ketals. Dioxolane structural effects
作者:Eugene A Mash、Keith A Nelson、Phillip C Heidt
DOI:10.1016/s0040-4039(00)95995-1
日期:1987.1
series of 2-cyclohexen-1-one ketals related to 2-cyclohexen-1-one 1,4-di- O-benzyl-L-threitol ketal but possesing different dioxolane appendages was prepared and subjected to Simmons-Smith cycloproponation. The observed diastereoselectivity decreased when oxygen was present in the appendages. In the absence of appendage oxygen, the sense of the observed diastereoselectivity was found to depend upon dioxolane