51
|
Won JE, Kim HK, Kim JJ, Yim HS, Kim MJ, Kang SB, Chung HA, Lee SG, Yoon YJ. Effective esterification of carboxylic acids using (6-oxo-6H-pyridazin-1-yl)phosphoric acid diethyl ester as novel coupling agents. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.10.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
52
|
Nakatsuji H, Morimoto M, Misaki T, Tanabe Y. Mild, powerful, and robust methods for esterification, amide formation, and thioesterification between acid chlorides and alcohols, amines, thiols, respectively. Tetrahedron 2007. [DOI: 10.1016/j.tet.2007.08.117] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
53
|
Funasaka S, Mukaiyama T. Efficient Method for Dehydration Condensation Using Pyridine-3-carboxylic Anhydride (3-PCA): Synthesis of Carboxamides from Nearly Equimolar Amounts of Carboxylic Acids and Amines. CHEM LETT 2007. [DOI: 10.1246/cl.2007.658] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
54
|
Mercs L, Pozzi G, Quici S. Efficient condensation of carboxylic acids with alcohols catalyzed by fluorous ammonium triflates. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.02.117] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
55
|
Mukaiyama T, Funasaka S. Pyridine-3-carboxylic Anhydride (3-PCA): A Versatile, Practical, and Inexpensive Reagent for Condensation Reaction between Carboxylic Acids and Alcohols. CHEM LETT 2007. [DOI: 10.1246/cl.2007.326] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
56
|
Tanabe Y, Nagase R, Gotoh H, Katayama M, Manta N. Regioselective Synthesis of Methyl 3-Thiothiophene-2-carboxylate Derivatives Utilizing a Dehydration-Type Ti-Dieckmann Condensation. HETEROCYCLES 2007. [DOI: 10.3987/com-07-s(k)56] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
57
|
Iida A, Nakazawa S, Nakatsuji H, Misaki T, Tanabe Y. Reductive Ti-crossed Claisen Condensation between Methyl α-Bromocarboxylates and Acid Chlorides Utilizing a TiCl4–PPh3–N-Methylimidazole Reagent. CHEM LETT 2007. [DOI: 10.1246/cl.2007.48] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
58
|
Nagase R, Matsumoto N, Hosomi K, Higashi T, Funakoshi S, Misaki T, Tanabe Y. Ti-direct, powerful, stereoselective aldol-type additions of esters and thioesters to carbonyl compounds: application to the synthesis and evaluation of lactone analogs of jasmone perfumes. Org Biomol Chem 2007; 5:151-9. [PMID: 17164920 DOI: 10.1039/b613544g] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient TiCl(4)-Et(3)N or Bu(3)N-promoted aldol-type addition of phenyl and thiophenyl esters or thioaryl esters with aldehydes and ketones was performed (total 46 examples). The present method is advantageous from atom-economical and cost-effective viewpoints; good to excellent yields, moderate to good syn-selectivity, substrate variations, reagent availability, and simple procedures. Utilizing the present reaction as the key step, an efficient short synthesis of three lactone [2(5H)-furanone] analogs of jasmine perfumes was performed. Among them, the lactone analog of cis-jasmone had a unique perfume property (tabac).
Collapse
Affiliation(s)
- Ryohei Nagase
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | | | | | | | | | | | | |
Collapse
|
59
|
Iida A, Nakazawa S, Okabayashi T, Horii A, Misaki T, Tanabe Y. Powerful Ti-Crossed Claisen Condensation between Ketene Silyl Acetals or Thioacetals and Acid Chlorides or Acids. Org Lett 2006; 8:5215-8. [PMID: 17078681 DOI: 10.1021/ol0619361] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[Structure: see text] A powerful Ti-crossed Claisen condensation between ketene silyl acetals (KSAs) and acid chlorides was successfully performed to give alpha-monoalkylated esters and thermodynamically unfavorable (less accessible) alpha,alpha-dialkylated beta-keto esters in good yield (46 examples; 41-98% yield). A closely related reaction between ketene silyl thioacetals (KSTAs) and acid chlorides also proceeded smoothly to give alpha-monoalkylated and alpha,alpha-dialkylated beta-keto thioesters (21 examples; 61-97% yield). The present protocol was extended to the direct condensation of KSAs with carboxylic acids (14 examples; 71-97% yield).
Collapse
Affiliation(s)
- Akira Iida
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
| | | | | | | | | | | |
Collapse
|
60
|
Nakatsuji H, Morita JI, Misaki T, Tanabe Y. Water Solvent Method for Esterification and Amide Formation between Acid Chlorides and Alcohols Promoted by Combined Catalytic Amines: Synergy betweenN-Methylimidazole andN,N,N′,N′-Tetramethylethylenediamine (TMEDA). Adv Synth Catal 2006. [DOI: 10.1002/adsc.200600256] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
61
|
Onitsuka K, Mori T, Yamamoto M, Takei F, Takahashi S. Helical Sense Selective Polymerization of Bulky Aryl Isocyanide Possessing Chiral Ester or Amide Groups Initiated by Arylrhodium Complexes. Macromolecules 2006. [DOI: 10.1021/ma061758r] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kiyotaka Onitsuka
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Tomoko Mori
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Mari Yamamoto
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Fumie Takei
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| | - Shigetoshi Takahashi
- The Institute of Scientific and Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
| |
Collapse
|
62
|
Katritzky AR, Angrish P. Efficient microwave assisted access to chiral O-(alpha-protected-aminoacyl)steroids. Steroids 2006; 71:660-9. [PMID: 16780907 DOI: 10.1016/j.steroids.2006.04.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2006] [Revised: 04/01/2006] [Accepted: 04/11/2006] [Indexed: 10/24/2022]
Abstract
Chiral O-(alpha-protected-aminoacyl)steroids 4a-f, 6a-b, 8 and 4a+4d and O-(alpha-protected-dipeptidoyl)steroids 12a,b are conveniently prepared under microwave irradiation in isolated yields of 65-96%, with complete chirality retention. The reaction utilized readily available N-(Z-alpha-aminoacyl)benzotriazoles 2a-f and Z-dipeptidoylbenzotriazole 11, with naturally occurring steroidal alcohols 3,5,7,9.
Collapse
Affiliation(s)
- Alan R Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, 32611-7200, USA.
| | | |
Collapse
|
63
|
Mukaiyama T, Tozawa T, Yamane Y. A Convenient Method for the Synthesis of Carboxamides and Thioesters by Using Tetrakis(2-methylimidazol-1-yl)silane. HETEROCYCLES 2006. [DOI: 10.3987/com-05-s(t)31] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
64
|
Mantri K, Nakamura R, Komura K, Sugi Y. Esterification of Long Chain Aliphatic Acids with Long Chain Alcohols Catalyzed by Multi-valent Metal Salts. CHEM LETT 2005. [DOI: 10.1246/cl.2005.1502] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
65
|
Oohashi Y, Fukumoto K, Mukaiyama T. A New Method for the Synthesis of Carboxylic Esters and Lactones with Di-2-thienyl Carbonate (2-DTC) by the Promotion of DMAP and Iodine. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2005. [DOI: 10.1246/bcsj.78.1508] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
66
|
Misaki T, Nagase R, Matsumoto K, Tanabe Y. Ti-Crossed-Claisen Condensation between Carboxylic Esters and Acid Chlorides or Acids: A Highly Selective and General Method for the Preparation of Various β-Keto Esters. J Am Chem Soc 2005; 127:2854-5. [PMID: 15740112 DOI: 10.1021/ja043833o] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ti-crossed-Claisen condensation between a 1:1 mixture of carboxylic esters and acid chlorides promoted by TiCl4-Bu3N-N-methylimidazole proceeded successfully to give various beta-keto esters in good yields with excellent selectivities (19 examples, approximately 48-95% yield; cross/self-selectivity = approximately 96/4-99/1). The present method was extended to the condensation between a 1:1 mixture of carboxylic acids and carboxylic esters (six examples, approximately 70-92% yield; cross/self-selectivity = approximately 91/9-99/1). To demonstrate the utility of the present two Ti-crossed-Claisen condensations, we performed a couple of efficient short-step syntheses of two natural, representative, and useful perfumes, cis-jasmone and (R)-muscone.
Collapse
Affiliation(s)
- Tomonori Misaki
- Department of Chemistry, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
| | | | | | | |
Collapse
|
67
|
Oohashi Y, Fukumoto K, Mukaiyama T. Efficient Method for the Esterification of Carboxylic Acids with Alcohols Using Di-2-thienyl Carbonate Promoted by Catalytic Amounts of DMAP and Hf(OTf)4. CHEM LETT 2005. [DOI: 10.1246/cl.2005.190] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
68
|
Oohashi Y, Fukumoto K, Mukaiyama T. Efficient Method for the Esterification of Carboxylic Acids with Alcohols Using Di-2-thienyl Carbonate Promoted by DMAP and Iodine. CHEM LETT 2004. [DOI: 10.1246/cl.2004.968] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
69
|
Mukaiyama T, Oohashi Y, Fukumoto K. A New Method for the Esterification of Carboxylic Acids with Various Alcohols by Using Di-2-thienyl Carbonate, a New Coupling Reagent. CHEM LETT 2004. [DOI: 10.1246/cl.2004.552] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
70
|
Shiina I, Kawakita YI. The effective use of substituted benzoic anhydrides for the synthesis of carboxamides. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.03.066] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|