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Volumn , Issue 13, 2008, Pages 1961-1964

Synthesis of novel 3-oxopiperidin-2-ones from methyl 2-alkoxy-5-amino-2- pentenoates

Author keywords

3 Oxopiperidin 2 ones; Acid hydrolysis; Azetidin 2 ones; Ring closure; Lactams

Indexed keywords

3 OXOPIPERIDIN 2 ONE DERIVATIVE; 4 (1 CHLORO 1 METHYLETHYL)AZETIDINE 2 ONE DERIVATIVE; 4 (2 HALO 1,1 DIMETHYLETHYL)AZETIDIN 2 ONE DERIVATIVE; AZETIDINE DERIVATIVE; METHANOL; METHOXIDE SODIUM; METHYL 2 ALKOXY 5 AMINO 2 PENTENOATE DERIVATIVE; OXIDE; PIPERIDINE DERIVATIVE; PYRROLIDINE DERIVATIVE; SULFURIC ACID;

EID: 49649109612     PISSN: 09365214     EISSN: None     Source Type: Journal    
DOI: 10.1055/s-2008-1077970     Document Type: Article
Times cited : (8)

References (54)
  • 6
    • 0004030275 scopus 로고
    • Page, M. I, Ed, Chapman and Hall: London
    • (f) The Chemistry of β-Lactams; Page, M. I., Ed.; Chapman and Hall: London, 1992.
    • (1992) The Chemistry of β-Lactams
  • 38
    • 49649090479 scopus 로고    scopus 로고
    • Representative Procedure; Synthesis of 1-Isopropyl-5,5- dimethylpiperidine-2,3-dione (6c, To (Z)-methyl 5-isopropylamino-2-methoxy- 4,4-dimethyl-2-pentenoate(4c; 0.50 g, 2.2 mmol)7 was added coned sulfuric acid (0.6 mL, 21.6 mmol) dropwise. The resulting homogeneous mixture was stirred at r.t. for 1 h and subsequently cooled to O °C. NaOH (1 M) was added cautiously dropwise until pH 10, the resulting aqueous phase was extracted with CH2Cl2 (3x5 mL) and the combined organic phases were dried (MgSO4, After filtration and evaporation of the solvent, crude 5,5-dimethyl-l-isopropylpiperidine-2,3-dione (6c) was purified by filtration over silica gel using EtOAc. 1-Isopropyl-5,5-dimethylpiperidine-2, 3-dione (6c, yield: 50, 1H NMR (270 MHz, CDCl3, δ, 1.13 (s, 6 H, CqMe2, 1.18 (d, J= 6.6 Hz, 6 H, CHCe2, 2.54 [s, 2 H, C(O)CH2, 3.22 s, 2 H
    • 2: C, 65.54; H, 9.35; N, 7.64. Found: C, 65.43; H, 9.51; N, 7.53.
  • 52
    • 49649127240 scopus 로고    scopus 로고
    • Methyl 2-Hydroxy-4-isopropylamino-4-methyl- pentanoate (7a, yield: 86, A7Rf, CH2Cl2-MeOH, 19:1, 1HNMR(270 MHz, CDCl3, δ, 1.09, 1.11(2 x d, J= 6.3 Hz, 6 H, Me2CH, 1.19,1.27 (2 x s, 6 H, C qMe2, 1.72 (d, J, 6.6 Hz, 2 H, C qCH2, 2.99 (sept, J= 6.3 Hz, 1 H, CAMe 2, 3.75 (s, 3 H, OMe, 4.58 (t, J= 6.6 Hz, 1 H, OCH, 13C NMR (68 MHz, CDCl3, δ, 24.21, 28.88 (C qMe2, 25.79,26.35 (CHMe2, 42.64 (NCH, 43.11 (CHCH2, 51.59 (OMe, 54.32 (CqMe2, 69.52 (OCH, 174.39 (C=O, IR (NaCl, 3286, 1754 (OH, C=O) cm-1. MS (70 eV, m/z, no [M, 201 (15, 188 (33, M, Me, 186 (22, 171 (35, 170(15, 156(72, 144(11, 138(9, 128(24, 115 (13, 114 (38, 102 (12, 100 79, 99
    • +-Me], 186 (22), 171 (35), 170(15), 156(72), 144(11), 138(9), 128(24), 115 (13), 114 (38), 102 (12), 100 (79), 99 (10), 98 (17), 96 (15), 86 (22), 85 (24), 84 (60), 83 (16), 74 (12), 72 (11), 71 (51), 70 (16), 68 (17), 58 (54), 57 (20), 56 (21), 55 (24).
  • 53
    • 49649092950 scopus 로고    scopus 로고
    • 1-Isopropyl-3-methoxy-5,5-dimethylpiperidin-2-one (12, yield: 80, Rf0.40 (hexane-EtOAc, 3:2, 1HNMR (270 MHz, CDCl3, δ, 1.02, 1.05 (2 x s, 6 H, CqMe 2, 1.04, 1.06 (2 x d, J= 6.9 Hz, 6 H, Me2CH, 1.62 [dd, J= 7.0,13.0 Hz, 1 H, CqC#(H, 1.88 [dd, J= 8.0, 13.0Hz, 1 H, CqCH(H, 2.79 [d, J= 12.0 Hz, 1 H, NCH(H, 2.97 [d, J= 12.0 Hz, 1 H, NCH(H, 3.57 (s, 3 H, OMe, 3.87 (dd, J, 8.0. 13.0 Hz, 1 H, OCH, 4.87 (sept, J= 6.9 Hz, 1 H, CiMe2, 13C NMR (68 MHz, CDCl3, δ= 19.19, 19.43 (CHMe2, 26.04, 28.84 (CqMe2, 29.92 (CqCH2, 40.65 (CqCH2, 43.41 (CAMe2, 51.30 (NCH2, 58.85 (OMe, 75.96 (OCH, 169.13 (C=O, IR (NaCl, 1646 (C=O) cm-1. MS 70 eV, m/z, no [M
    • 2: C, 66.29; H, 10.62; N, 7.03. Found: C, 66.13; H, 10.80; N, 6.88.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.