A Total Synthesis of (±)-Ceratopicanol via Palladium Catalyzed Reductive Cyclization
作者:Rira Kim、Sanghyeon Lee、Jaeyeon Lee、Hee-Yoon Lee
DOI:10.1002/ejoc.202000769
日期:2020.8.23
An efficient totalsynthesis of ceratopicanol was achieved through successive Pd catalyzed reductive cycloaddition and cyclization reactions. The Pd mediated cyclization reaction to form a triquinane structure demonstrated that a small structural difference changed the reaction pathway either to form different structures or reduced non‐cyclized product depending on the reaction conditions.
Total Synthesis of Ceratopicanol through Tandem Cycloaddition Reaction of a Linear Substrate
作者:Sang-Shin Lee、Won-Yeob Kim、Hee-Yoon Lee
DOI:10.1002/asia.201200497
日期:2012.10
Totalsynthesis of ceratopicanol (1) was achieved with a tandemcycloadditionreaction of allenyl diazo compound 6 via a trimethylenemethane (TMM) diyl intermediate. The TMM diyl mediated [2+3] cycloadditionreaction furnished the consecutive quaternary carbon centers and showed an unusual diastereoselectivity.
Applications of the Squarate Ester Cascade to the Expeditious Synthesis of Hypnophilin, Coriolin, and Ceratopicanol
作者:Leo A. Paquette、Feng Geng
DOI:10.1021/ja020474t
日期:2002.8.1
consisted of the use of lithium in liquidammonia. The three divergent synthetic objectives realized in these experiments involved (a) generation of an extended enolate anion and its regioselective C-methylation at the gamma-carbon; (b) unprecedented reductivecleavage of a beta-isopropoxy group in a 2,3-diisopropoxy-2-cyclopentenone setting; and (c) conventional conversion of an alpha-alkoxy ketone
Synthesis of the sesquiterpene (±)-ceratopicanol: Use of radicals derived from epoxides
作者:Derrick L.J. Clive、Steven R. Magnuson
DOI:10.1016/0040-4039(94)02158-8
日期:1995.1
The sesquiterpene (±)-ceratopicanol [(±)-1] was synthesized by a route based on Claisen rearrangement (7 → 8) and radical cyclization (16α, 16β → 17α, 17β). Certain limitations on vinyl radical cyclization were observed, and so the required radical was generated by titanium-induced opening of an epoxide.
作者:Chisato Mukai、Minoru Kobayashi、In Jong Kim、Miyoji Hanaoka
DOI:10.1016/s0040-4020(02)00498-2
日期:2002.6
Total synthesis of (+/-)-ceratopicanol (1) from commercially available 2-allyl-2-methyleyclopenta-1,3-dione (6) was completed. By taking advantage of the two carbonyl functionalities, 6 was transformed into the enyne 14 having an alkyne moiety, methyl substituent, and the hydroxy functionality with proper stereochemistry. The Pauson-Khand reaction of 14 was followed by chemical modifications resulting in the alternative total synthesis of (+/-)-ceratopicanol (1). (C) 2002 Elsevier Science Ltd. All rights reserved.