Tetrahedron Letters p. 4117 - 4118 (1991)
Update date:2022-08-04
Topics:
Soukup
Widmer
An efficient access to (7Z)- and (7Z,11Z)-vitamin A is described. Following the addition of a C6-acetylenic building block to 2,6,6-trimethylcyclohexanone (2), dehydration of the tert. alcohol 3 and formation of the C15-Wittig salt, the (7Z)-geometry was introduced by partial hydrogenation of the triple bond over Raney-nickel. Following Wittig reaction with (E)-2-methyl-4-acetoxy-2-butenal gave a mixture of the title compounds 8 and 9 which could easily be separated.
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Doi:10.1039/c39910001314
(1991)Doi:10.1080/00397919108021778
(1991)Doi:10.1021/ol3007259
(2012)Doi:10.1016/j.febslet.2014.03.041
(2014)Doi:10.1021/ml3000066
(2012)Doi:10.1021/ja01296a035
(1936)