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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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2
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Chelucci G. Synthesis and Metal-Catalyzed Reactions of gem-Dihalovinyl Systems. Chem Rev 2011; 112:1344-462. [DOI: 10.1021/cr200165q] [Citation(s) in RCA: 323] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Giorgio Chelucci
- Dipartimento di Agraria, Università di Sassari, viale Italia 39, I-07100 Sassari, Italy
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Ito S, Sekiguchi S, Freytag M, Yoshifuji M. An Efficient Synthetic Method of 1-(2,4,6-Tri-t-butylphenyl)-3-phenyl-1-phosphaallenes [Mes*P=C=CR–Ph; R = H, SiMe3] from Dibromophosphaethene [Mes*P=CBr2] (Mes*= 2,4,6-t-Bu3C6H2). BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2005. [DOI: 10.1246/bcsj.78.1142] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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4
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Seebach D, Kimmerlin T, Šebesta R, Campo MA, Beck AK. How we drifted into peptide chemistry and where we have arrived at. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.06.043] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Eisler S, Tykwinski RR. Expandierte Radialene: modulare Synthese und Charakterisierung von gekreuzt konjugierten Enin-Makrocyclen. Angew Chem Int Ed Engl 1999. [DOI: 10.1002/(sici)1521-3757(19990712)111:13/14<2138::aid-ange2138>3.0.co;2-f] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Harada T, Iwazaki K, Otani T, Oku A. Generation of Cycloalkylidene Carbenes via Exo-Type Cyclization of Alkynyllithiums Bearing Remote Leaving Group. J Org Chem 1998. [DOI: 10.1021/jo981411p] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Toshiro Harada
- Department of Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku 606, Japan
| | - Katsuhiro Iwazaki
- Department of Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku 606, Japan
| | - Takeshi Otani
- Department of Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku 606, Japan
| | - Akira Oku
- Department of Chemistry, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku 606, Japan
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Braun M, Mahler H. Non-chelate-controlled addition of 1-Bromo-1-lithio-1-alkenes toO-protected lactaldehydes and 3-alkoxybutyraldehydes. ACTA ACUST UNITED AC 1995. [DOI: 10.1002/jlac.199519950107] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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The reaction of 1-chloro-2-methyl-1-propenyllithium with a selection of organolithiums. The development and synthetic utility of novel base/nucleophile combinations. J Organomet Chem 1993. [DOI: 10.1016/0022-328x(93)83391-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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9
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Harada T, Hara D, Hattori K, Oku A. Generation and alkylation reaction of 1-bromoalkenylzincate. Tetrahedron Lett 1988. [DOI: 10.1016/s0040-4039(00)82124-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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