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Britten TK, McLaughlin MG, Basson AJ, Roberts DD. Aza-Peterson Olefinations: Rapid Synthesis of (E)-Alkenes. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1493-6670] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
AbstractAn aza-Peterson olefination methodology to access 1,3-dienes and stilbene derivatives from the corresponding allyl- or benzyltrimethylsilane is described. Silanes can be deprotonated using Schlosser’s base and added to N-phenyl imines or ketones to directly give the desired products in high yields.
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2
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Lu L, Zhang W, Nam S, Horne DA, Jove R, Carter RG. Amphidinolide B: total synthesis, structural investigation, and biological evaluation. J Org Chem 2013; 78:2213-47. [PMID: 23406192 PMCID: PMC3631602 DOI: 10.1021/jo3026077] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The total syntheses of amphidinolide B1 and the proposed structure of amphidinolide B2 have been accomplished. Key aspects of this work include the development of a practical, non-transition-metal-mediated method for the construction of the C13-C15 diene, the identification of α-chelation and dipole minimization models for diastereoselective methyl ketone aldol reactions, the discovery of a spontaneous Horner-Wadsworth-Emmons macrocyclization strategy, and the development of a novel late stage method for construction of an allylic epoxide moiety. The originally proposed structure for amphidinolide B2 and diastereomers thereof display potent antitumor activities with IC50 values ranging from 3.3 to 94.5 nM against human solid and blood tumor cells. Of the different stereoisomers, the proposed structure of amphidinolide B2 is over 12-fold more potent than the C8,9-epimer and C18-epimer in human DU145 prostate cancer cells. These data suggest that the epoxide stereochemistry is a significant factor for anticancer activity.
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Affiliation(s)
- Liang Lu
- Department of Chemistry, Oregon State University, Corvallis, OR 97331
| | - Wei Zhang
- Department of Chemistry, Oregon State University, Corvallis, OR 97331
| | - Sangkil Nam
- Department of Molecular Medicine, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - David A. Horne
- Department of Molecular Medicine, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - Richard Jove
- Department of Molecular Medicine, Beckman Research Institute, City of Hope, Duarte, CA 91010, USA
| | - Rich G. Carter
- Department of Chemistry, Oregon State University, Corvallis, OR 97331
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Princet B, Anselme G, Pornet J. A Convenient Synthesis of (E)-β-Hydroxyvinyl Trimethylsilanes via 3,3-bis(Trimethylsilyl)propene. SYNTHETIC COMMUN 2007. [DOI: 10.1080/00397919908085961] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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4
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Shen YC, Hung MC, Wang LT, Chen CY. Inocalophyllins A, B and their methyl esters from the seeds of Calophyllum inophyllum. Chem Pharm Bull (Tokyo) 2003; 51:802-6. [PMID: 12843586 DOI: 10.1248/cpb.51.802] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Fractionation of the ethanolic extract of the seeds of Calophyllum inophyllum L. has resulted in the isolation of four novel pyranocoumarin derivatives, designated as inocalophyllins A (1), B (2) and their methyl esters (3, 4) in addition to the known calophyllolide. The structures of these compounds have been determined on the basis of spectroscopic analysis including MS, heteronuclear single quantum coherence (HSQC), heteronuclear multiple bond connectivity (HMBC) and two dimensional incredible natural abundance double quantum transfer experiment (2D-INADEQUATE). Two new methylated products, 5 and 6 were also prepared by methylation of compounds 1 and 2, respectively.
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Affiliation(s)
- Ya-Ching Shen
- Institute of Marine Resources, National Sun Yat-sen University, Taiwan, Republic of China.
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5
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Agami C, Comesse S, Kadouri-Puchot C. The intriguing reactivity of functionalized beta-amino alcohols with glyoxal: application to a new expedient enantioselective synthesis of trans-6-alkylpipecolic acids. J Org Chem 2002; 67:2424-8. [PMID: 11950283 DOI: 10.1021/jo010780+] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
New beta-amino alcohols possessing a vinylsilane moiety were reacted with glyoxal to produce lactones that were transformed in three steps in enantiopure pipecolic acid derivatives. The key step was a totally diastereoselective ene-iminium cyclization, whose mechanism can be viewed as a direct cyclization of the vinylsilane moiety onto the iminium ion. The reactivity of two beta-amino alcohols having an allylsilane terminator was also examined. Their difference of reactivity toward glyoxal can be ascribed to the intervention of a carbocation, which presents a behavior that differs according to the position of the trimethylsilyl group.
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Affiliation(s)
- Claude Agami
- Laboratoire de Synthèse Asymétrique (UMR CNRS 7611), Case courrier 47, Université P. et M. Curie, 4 place Jussieu, 75005 Paris, France
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Agami C, Comesse S, Kadouri-Puchot C. Asymmetric syntheses of new functionalized beta-amino alcohols via diastereoselective addition of organometallic reagents onto oxazolidines. J Org Chem 2002; 67:1496-500. [PMID: 11871878 DOI: 10.1021/jo010779a] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Diastereoselective reactions between (S)-phenylglycinol-derived oxazolidines and two unsaturated organolithium reagents afforded chiral beta-amino alcohols having vinyl and alkynylsilane moieties. When the same reactions were performed in the presence of titanium isopropoxide, a dramatic change of regioselectivity was observed, from the alpha- to the gamma-position, thus producing beta-amino alcohols with allyl or allenylsilane functions. A rationalization of the observed diastereoselectivity was suggested for each case.
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Affiliation(s)
- Claude Agami
- Laboratoire de Synthèse Asymétrique (UMR CNRS 7611), Case courrier 47, Université Pierre et Marie Curie, 4 place Jussieu, 75005 Paris, France
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Katritzky AR, Piffl M, Lang H, Anders E. Regioselectivity of the Reactions of Heteroatom-Stabilized Allyl Anions with Electrophiles. Chem Rev 1999; 99:665-722. [PMID: 11749429 DOI: 10.1021/cr9404297] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alan R. Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, and Institut für Organische Chemie und Makromolekulare Chemie der Friedrich-Schiller-Universität Jena, Humboldtstrasse 10, D-07743 Jena, Germany
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Shi YJ, Wells KM, Pye PJ, Choi WB, Churchill HR, Lynch JE, Maliakal A, Sager JW, Rossen K, Volante R, Reider PJ. Crystallization-induced asymmetric transformation: Stereospecific synthesis of L-768,673. Tetrahedron 1999. [DOI: 10.1016/s0040-4020(98)01098-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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Takaku K, Shinokubo H, Oshima K. γ-Regioselective reaction of metaloxysilyl-substituted allyllithium derived from allyldiphenylsilanol. Tetrahedron Lett 1997. [DOI: 10.1016/s0040-4039(97)01124-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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10
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Hojo F, Terashima T, Ando W. Reduction of Polysilacycloallenes by Sodium: Structure of the Donor-Free Sodium Salt of an Allyl Anion. Organometallics 1996. [DOI: 10.1021/om960057n] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fusao Hojo
- Department of Chemistry, University of Tsukuba, Tsukuba, Ibaraki 305, Japan
| | - Tomoko Terashima
- Department of Chemistry, University of Tsukuba, Tsukuba, Ibaraki 305, Japan
| | - Wataru Ando
- Department of Chemistry, University of Tsukuba, Tsukuba, Ibaraki 305, Japan
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Probst MF, Modro TA. 3-Silanyl-propenylphosphonates: Properties and alkylation potential. HETEROATOM CHEMISTRY 1995. [DOI: 10.1002/hc.520060614] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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E. Takacs B, M. Takacs J. Catalytic iron-mediated ene carbocyclizations of trienes: The stereoselecitve preparation of N-acylpiperidines. Tetrahedron Lett 1990. [DOI: 10.1016/0040-4039(90)80168-l] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Silafunctional compounds in organic synthesis. 40.1 metalated (allyl) aminosilanes: a γ-regioselective reaction with aldehydes and an approach to the synthesis of 2-deoxy-c-nucleoside skeletons. Tetrahedron 1988. [DOI: 10.1016/s0040-4020(01)86651-5] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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19
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Stereoselective synthesis of (z)- and (e)-1,3-alkadienes from aldehydes using organotitanium and lithium reagents. Tetrahedron 1987. [DOI: 10.1016/s0040-4020(01)90006-7] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Uno H. Regioselective Carboxylation of Silicon-Stabilized Allylic Carbanions and the Synthetic Utility of 2-Silyl-3-butenoates. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 1986. [DOI: 10.1246/bcsj.59.2471] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Corriu R, Escudie N, Guerin C. Le bis(triméthylsilyl)-1,3-propène comme précurseur des silyl-1-butadiènes; Étude de leur complexation par Fe(CO)5, Fe2(CO)9, et (MeCp)Mn(CO)3. J Organomet Chem 1984. [DOI: 10.1016/0022-328x(84)85146-3] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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25
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Regioselection in the alkylation of trimethylsilylallyl anion - stereoselective synthesis of disubstituted alkenes. Tetrahedron Lett 1984. [DOI: 10.1016/s0040-4039(01)80008-3] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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27
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Equivalents anioniques homoenolates issus d'enephosphoramides: reaction avec la benzophenone. J Organomet Chem 1983. [DOI: 10.1016/s0022-328x(00)99263-5] [Citation(s) in RCA: 8] [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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Sato F, Suzuki Y, Sato M. A stereo- and regio-specific addition of η3-trimethylsilylallyltitanium compound with aldehydes. A facile and stereocontrolled synthesis of E- and Z-terminal dienes. Tetrahedron Lett 1982. [DOI: 10.1016/s0040-4039(00)85661-0] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Ehlinger E, Magnus P. Silicon in synthesis: use of the highly nucleophilic trimethylsilyallyl anion for the synthesis of steroidal 17-spiro-γ-lactones. Tetrahedron Lett 1980. [DOI: 10.1016/s0040-4039(00)93611-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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M. Kaiser E. Lithium. J Organomet Chem 1979. [DOI: 10.1016/s0022-328x(00)82803-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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36
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Itoh A, Oshima K, Nozaki H. Stereospecific 2-vinylcyclohexanol formation via internal attack of an allylsilane moiety on an aldehyde group. Tetrahedron Lett 1979. [DOI: 10.1016/s0040-4039(01)86217-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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