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Abstract
Allenes represent an extremely important class of organic molecules, which, as
a result of their twisted orthogonal π-systems can possess axial chirality. A wide array of
methods for allene synthesis have been reported, such as the substitution of propargylic
electrophiles, isomerization of alkynes and sigmatropic rearrangement. An alternative approach
for the synthesis of allenes is 1,2-elimination of an appropriately substituted precursor.
This mini-review highlights recent examples of 1,2-elimination processes, which
target allenes including both polar and radical processes. The main focus is upon how control
over the stereospecificity (e.g. syn- or anti-) of the 1,2-elimination process can enable
the synthesis of enantioenriched axially chiral allenes. Recent developments in this field
are presented including both enantiospecific and catalytic asymmetric methods.
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Affiliation(s)
- Roly J. Armstrong
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Oxford, OX1 3TA, United Kingdom
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Liu YK, Ma C, Jiang K, Liu TY, Chen YC. Asymmetric Tandem Michael Addition−Wittig Reaction to Cyclohexenone Annulation. Org Lett 2009; 11:2848-51. [PMID: 19518069 DOI: 10.1021/ol9010568] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Yan-kai Liu
- Key Laboratory of Drug-Targeting and Drug Delivery System of Education Ministry, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu 610041, China, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| | - Chao Ma
- Key Laboratory of Drug-Targeting and Drug Delivery System of Education Ministry, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu 610041, China, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| | - Kun Jiang
- Key Laboratory of Drug-Targeting and Drug Delivery System of Education Ministry, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu 610041, China, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| | - Tian-Yu Liu
- Key Laboratory of Drug-Targeting and Drug Delivery System of Education Ministry, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu 610041, China, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| | - Ying-Chun Chen
- Key Laboratory of Drug-Targeting and Drug Delivery System of Education Ministry, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University, Chengdu 610041, China, and State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
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Islami MR, Rouh-Alamini MY. A Simple and an Efficient Method for Preparation of New Phosphorus Ylides Containing Several Functional Groups Using Aryl Thiourea. PHOSPHORUS SULFUR 2007. [DOI: 10.1080/10426500701542890] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Gold-catalyzed cyclization of tert-butyl allenoate: general synthesis of 2,4-functionalized butenolides. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2005.08.084] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Pinho e Melo T, Cardoso A, d’A. Rocha Gonsalves A, Costa Pessoa J, Paixão J, Beja A. Novel Asymmetric Wittig Reaction: Synthesis of Chiral Allenic Esters. European J Org Chem 2004. [DOI: 10.1002/ejoc.200400413] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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