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Synthesis 2005(17): 2901-2905
DOI: 10.1055/s-2005-916008
DOI: 10.1055/s-2005-916008
PAPER
© Georg Thieme Verlag Stuttgart · New York
Stereoselective Synthesis of 3,5-Dialkyl-3,5-dihydro-3,5-diphenyl-4H-pyrazol-4-ones
Further Information
Received
12 April 2005
Publication Date:
26 August 2005 (online)
Publication History
Publication Date:
26 August 2005 (online)
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Abstract
We report stereoselective five-step syntheses of cis-3-ethyl-3,5-dihydro-3,5-diphenyl-5-methyl-4H-pyrazol-4-one (cis-1b) and trans-3,5-diethyl-3,5-dihydro-3,5-diphenyl-4H-pyrazol-4-one (trans-1c). The key synthon was 1,3-diphenylpent-2-en-1-one (5b) synthesized in a new one-pot crossed aldol/dehydration reaction of acetophenone with propiophenone using titanium(IV) chloride/tributylamine, followed by treatment with methanesulfonyl chloride and triethylamine.
Key words
stereoselective synthesis - 3,5-dialkyl-3,5-dihydro-3,5-diphenyl-4H-pyrazol-4-ones - β-alkyl chalcones - crossed aldol/dehydration - heterocyclic compounds
- 1
Pirkle WH.Hoover DJ. J. Org. Chem. 1980, 45: 3407 - 2
Pirkle WH.Kalish R. J. Am. Chem. Soc. 1967, 89: 2781 -
3a
Adam W.Fuss A.Mazenod FP.Quast H. J. Am. Chem. Soc. 1981, 103: 998 -
3b
Quast H.Fuss A. Angew. Chem., Int. Ed. Engl. 1981, 20: 291 -
3c
Sandler W.Wrobel R.Komnick P.Rademacher P.Muchall HM.Quast H. Eur. J. Org. Chem. 2000, 1: 91 -
4a
Berson JA. Acc. Chem. Res. 1978, 446 -
4b
Crawford RJ.Tokunaga H. Can. J. Chem. 1974, 52: 4033 -
5a
Kidwai M.Misra P. Synth. Commun. 1999, 29: 3237 -
5b
Sachchar SP.Singh AK. J. Indian Chem. Soc. 1985, 62: 142 -
5c
Kiyoshi T.Katsuya N.Nobukiyo K.Takashi T.Takehiro O.Hachiro S.Masaaki M. Chem. Pharm. Bull. 1997, 45: 987 -
6a
Wayne W.Adkins H. In Organic Synthesis Vol. 3: Wiley; New York: 1955. p.367 -
6b
Calloway NO.Green LD. J. Am. Chem. Soc. 1937, 59: 809 -
6c
Mazza LJ.Guarna A. Synth. Commun. 1980, 41 -
6d
Labadie JW.Tueting D.Stille JK. J. Org. Chem. 1983, 48: 4634 -
6e
Lyle RE.DeWitt EJ.Nichols NM.Cleland W. J. Am. Chem. Soc. 1953, 75: 5959 -
6f
Karger MH.Mazur Y. J. Org. Chem. 1971, 36: 540 -
6g
Lutz RE.Slade LT. J. Org. Chem. 1961, 26: 4888 -
7a
Takeda T.Kabasawa Y.Fujiwara T. Tetrahedron 1995, 51: 2515 -
7b
Pelter A.Ward RS.Ohlendorf D.Ashdown DHJ. Tetrahedron 1979, 35: 531 -
7c
Brunner M.Maas G. Synthesis 1995, 957 -
7d
Cox CD.Breslin MJ.Mariano BJ. Tetrahedron Lett. 2004, 45: 1489 -
7e
Bouhlel E.Hassine BB. Synth. Commun. 1992, 15: 2183 -
8a
Mukaiyama T.Narasaka K.Banno K. Chem. Lett. 1973, 1011 -
8b
Mukaiyama T.Banno K.Narasaka K. J. Am. Chem. Soc. 1974, 96: 7503 -
8c
Mukaiyama T. Angew. Chem., Int. Ed. Engl. 1977, 16: 817 -
9a
Tanabe Y.Matsimoto M.Higashi T.Misaki T.Itoh T.Yamamoto M.Mitarai K.Nishii Y. Tetrahedron 2002, 58: 8269 -
9b
Yoshida Y.Hayashi R.Sumihara H.Tanabe Y. Tetrahedron Lett. 1997, 38: 8727 -
10a
Hasegawa E.Ishiyama K.Horaguchi T.Shimizu T. J. Org. Chem. 1991, 56: 1631 -
10b
Wasserman HH.Aubrey NE.Zimmerman HE. J. Am. Chem. Soc. 1953, 75: 96 -
10c
Domagala JM.Bach RD. J. Am. Chem. Soc. 1979, 44: 3168