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    • 1. 发明授权
    • Process for 3.beta.-aminoazetidin-2-ones
    • 3β-氨基吖丁啶-2-酮的方法
    • US4243587A
    • 1981-01-06
    • US41282
    • 1979-05-21
    • Robin D. G. CooperGary A. KoppelLawrence J. McShane
    • Robin D. G. CooperGary A. KoppelLawrence J. McShane
    • C07D205/085C07D498/04
    • C07D205/085
    • 1-[.alpha.-(Carboxy)-4-hydroxybenzyl]-3.beta.-aminoazetidin-2-one esters are prepared by converting 2-acyl-3,3-dialkyl-7-oxo-.alpha.-[4-(benzyloxy)phenyl]-4-thia-2,6-diazabicyclo[3.2.0]-heptane-6-acetic acid esters with mercuric acetate in an aqueous organic solvent mixture, e.g., in aqueous methanol, to 7-oxo-3-phenyl-.alpha.-[4-(benzyloxy)phenyl]-4-oxa-2,6-diazabicyclo[3.2.0]hept-2-ene-1-acetic acid esters and the latter are reacted with PCl.sub.5 and pyridine to provide the monocyclic 1-[.alpha.-(carboxy)-4-benzyloxybenzyl]-3.beta.-(.alpha.-chlorobenzylidene-amino)-4-chloroazetidin-2-one esters. Reduction of the dichloro azetidin-2-one with an organo tin hydride and azobisisobutyronitrile affords the deschloro, 1-[.alpha.-(carboxy)-4-benzyloxybenzyl]-3.beta.-benzylideneaminoazetidin-2-one ester. The latter is hydrolyzed and the 4-benzyloxy group is cleaved via catalytic hydrogenolysis to yield an ester of 1-[.alpha.-(carboxy)-4-hydroxybenzyl]-3.beta.-aminoazetidin-2-one. The 3.beta.-amino ester is useful for the preparation of the antibiotic FR 1923 (nocardicin).
    • 通过将2-酰基-3,3-二烷基-7-氧代-α-[4-(苄氧基)苯基 ] -4-硫杂-2,6-二氮杂双环[3.2.0] - 庚烷-6-乙酸酯与乙酸汞在含水有机溶剂混合物(例如甲醇水溶液)中加入到7-氧代-3-苯基-α - [4-(苄氧基)苯基] -4-氧杂-2,6-二氮杂双环[3.2.0]庚-2-烯-1-乙酸酯,后者与PCl5和吡啶反应,得到单环1- -3α-(α-羧基)-4-苄氧基苄基]-3β-(α-氯亚苄基 - 氨基)-4-氯氮杂环丁-2-酮酯。 用有机锡氢化物和偶氮二异丁腈还原二氯氮杂环丁烷-2-酮,得到脱氯,1- [α-(羧基)-4-苄氧基苄基]-3β-亚苄基氨基氮杂环丁-2-酮酯。 后者被水解,4-苄氧基通过催化氢解裂解,得到1- [α-(羧基)-4-羟基苄基]-3β-氨基吖丁啶-2-酮的酯。 3β-氨基酯可用于制备抗生素FR1923(诺卡霉素)。
    • 3. 发明授权
    • 4-Oxa 2,6 diazabicycloheptane derivatives
    • 4-氧杂-2,6-二氮杂双环庚烷衍生物
    • US4180507A
    • 1979-12-25
    • US933707
    • 1978-08-15
    • Robin D. G. CooperGary A. KoppelLawrence J. McShane
    • Robin D. G. CooperGary A. KoppelLawrence J. McShane
    • C07D205/085C07D498/04C07D498/08
    • C07D205/085
    • 1-[.alpha.-(Carboxy)-4-hydroxybenzyl]-3.beta.-aminoazetidin-2-one esters are prepared by converting 2-acyl-3,3-dialkyl-7-oxo-.alpha.-[4-(benzyloxy)phenyl]-4-thia-2,6-diazabicyclo[3.2.0]-heptane-6-acetic acid esters with mercuric acetate in an aqueous organic solvent mixture, e.g., in aqueous methanol, to 7-oxo-3-phenyl-.alpha.-[4-benzyloxy)phenyl]-4-oxa-2,6-diazabicyclo[3.2.0]hept-2-ene-1-acetic acid esters and the latter are reacted with PCl.sub.5 and pyridine to provide the monocyclic 1-[.alpha.-(carboxy)-4-benzyloxybenzyl]-3.beta.-(.alpha.-chlorobenzylideneamino)-4-chloroazetidin-2-one esters. Reduction of the dichloro azetidin-2-one with an organo tin hydride and azobisisobutyronitrile affords the deschloro, 1-[.alpha.-(carboxy)-4-benzyloxybenzyl]-3.beta.-benzylideneaminoazetidin-2-one ester. The latter is hydrolyzed and the 4-benzyloxy group is cleaved via catalytic hydrogenolysis to yield an ester of 1-[.alpha.-(carboxy)-4-hydroxybenzyl]-3.beta.-aminoazetidin-2-one. The 3.beta.-amino ester is useful for the preparation of the antibiotic FR 1923 (nocardicin).
    • 通过将2-酰基-3,3-二烷基-7-氧代-α-[4-(苄氧基)苯基 ] -4-硫杂-2,6-二氮杂双环[3.2.0] - 庚烷-6-乙酸酯与乙酸汞在含水有机溶剂混合物(例如甲醇水溶液)中加入到7-氧代-3-苯基-α - [4-苄氧基)苯基] -4-氧杂-2,6-二氮杂双环[3.2.0]庚-2-烯-1-乙酸酯,后者与PCl5和吡啶反应,得到单环1- [ α - (羧基)-4-苄氧基苄基]-3β-(α-氯亚苄基氨基)-4-氯氮杂环丁-2-酮酯。 用有机锡氢化物和偶氮二异丁腈还原二氯氮杂环丁烷-2-酮,得到脱氯,1- [α-(羧基)-4-苄氧基苄基]-3β-亚苄基氨基氮杂环丁-2-酮酯。 后者被水解,4-苄氧基通过催化氢解裂解,得到1- [α-(羧基)-4-羟基苄基]-3β-氨基吖丁啶-2-酮的酯。 3β-氨基酯可用于制备抗生素FR1923(诺卡霉素)。
    • 4. 发明授权
    • Intermediates for 3-aminoazetidin-2-ones
    • 3-氨基氮杂环丁烷-2-酮的中间体
    • US4226767A
    • 1980-10-07
    • US41281
    • 1979-05-21
    • Robin D. G. CooperGary A. KoppelLawrence J. McShane
    • Robin D. G. CooperGary A. KoppelLawrence J. McShane
    • C07D205/085C07D498/04C07D205/08C07D277/06C07D513/04
    • C07D205/085
    • 1-[.alpha.-(Carboxy)-4-hydroxybenzyl]-3.beta.-aminoazetidin-2-one esters are prepared by converting 2-acyl-3,3-dialkyl-7-oxo-.alpha.-[4-(benzyloxy)phenyl]-4-thia-2,6-diazabicyclo[3.2.0]heptane-6-acetic acid esters with mercuric acetate in an aqueous organic solvent mixture, e.g., in aqueous methanol, to 7-oxo-3-phenyl-.alpha.-[4-(benzyloxy)phenyl]-4-oxa-2,6-diazabicyclo[3.2.0]hept-2-ene-1-acetic acid esters and the latter are reacted with PCl.sub.5 and pyridine to provide the monocyclic 1-[.alpha.-(carboxy)-4-benzyloxybenzyl]-3.beta.-(.alpha.-chlorobenzylideneamino)-4-chloroazetidin-2-one esters. Reduction of the dichloro azetidin-2-one with an organo tin hydride and azobisisobutyronitrile affords the deschloro, 1-[.alpha.-(carboxy)-4-benzyloxybenzyl]-3.beta.-benzylideneaminoazetidin-2-one ester. The latter is hydrolyzed and the benzyloxy group is cleaved via catalytic hydrogenolysis to yield an ester of 1-[.alpha.-(carboxy)-4-hydroxybenzyl]-3.beta.-aminoazetidin-2-one. The 3.beta.-amino ester is useful for the preparation of the antibiotic FR 1923 (nocardicin).
    • 通过将2-酰基-3,3-二烷基-7-氧代-α-[4-(苄氧基)苯基 ] -4-硫杂-2,6-二氮杂双环[3.2.0]庚烷-6-乙酸酯与乙酸汞在含水有机溶剂混合物(例如甲醇水溶液)中加入到7-氧代-3-苯基-α- [4-(苄氧基)苯基] -4-氧杂-2,6-二氮杂双环[3.2.0]庚-2-烯-1-乙酸酯,后者与PCl5和吡啶反应,得到单环1- [ α - (羧基)-4-苄氧基苄基]-3β-(α-氯亚苄基氨基)-4-氯氮杂环丁-2-酮酯。 用有机锡氢化物和偶氮二异丁腈还原二氯氮杂环丁烷-2-酮,得到脱氯,1- [α-(羧基)-4-苄氧基苄基]-3β-亚苄基氨基氮杂环丁-2-酮酯。 将后者水解并通过催化氢解裂解苄氧基,得到1- [α-(羧基)-4-羟基苄基]-3β-氨基吖丁啶-2-酮的酯。 3β-氨基酯可用于制备抗生素FR1923(诺卡霉素)。
    • 8. 发明授权
    • Process for 3.beta.-aminoazetidin-2-ones
    • 3 {62-氨基氮杂环丁烷-2-酮的方法
    • US4127568A
    • 1978-11-28
    • US775240
    • 1977-03-07
    • Robin D. G. CooperGary A. KoppelLawrence J. McShane
    • Robin D. G. CooperGary A. KoppelLawrence J. McShane
    • C07D205/08C07D205/085C07D498/04C07D507/00
    • C07D205/085
    • 1-[.alpha.-(Carboxy)-4-hydroxybenzyl]-3.beta.-aminoazetidin-2-one esters are prepared by converting 2-acyl-3,3-dialkyl-7-oxo-.alpha.-[4-(benzyloxy)phenyl]-4-thia-2,6-diazabicyclo[3.2.0]-heptane-6-acetic acid esters with mercuric acetate in an aqueous organic solvent mixture, e.g., in aqueous methanol, to 7-oxo-3-phenyl-.alpha.-[4-(benzyloxy)phenyl]-4-oxa-2,6-diazabicyclo[3.2.0]hept-2-ene-1-acetic acid esters and the latter are reacted with PCl.sub.5 and pyridine to provide the monocyclic 1-[.alpha.-(carboxy)-4-benzyloxybenzyl]-3.beta.-(.alpha.-chlorobenzylideneamino)-4-chloroazetidin-2-one esters. Reduction of the dichloro azetidin-2-one with an organo tin hydride and azobisisobutyronitrile affords the deschloro, 1-[.alpha.-(carboxy)-4-benzyloxybenzyl]-3.beta.-benzylideneaminoazetidin-2-one ester. The latter is hydrolyzed and the 4-benzyloxy group is cleaved via catalytic hydrogenolysis to yield an ester of 1-[.alpha.-(carboxy)-4-hydroxybenzyl]-3.beta.-aminoazetidin-2-one. The 3.beta.-amino ester is useful for the preparation of the antibiotic FR 1923 (nocardicin).
    • 通过将2-酰基-3,3-二烷基-7-氧代-α-[4-(苄氧基)苯基 ] -4-硫杂-2,6-二氮杂双环[3.2.0] - 庚烷-6-乙酸酯与乙酸汞在含水有机溶剂混合物(例如甲醇水溶液)中加入到7-氧代-3-苯基-α - [4-(苄氧基)苯基] -4-氧杂-2,6-二氮杂双环[3.2.0]庚-2-烯-1-乙酸酯,后者与PCl5和吡啶反应,得到单环1- -3α-(α-羧基)-4-苄氧基苄基]-3β-(α-氯亚苄基氨基)-4-氯氮杂环丁-2-酮酯。 用有机锡氢化物和偶氮二异丁腈还原二氯氮杂环丁烷-2-酮,得到脱氯,1- [α-(羧基)-4-苄氧基苄基]-3β-亚苄基氨基氮杂环丁-2-酮酯。 后者被水解,4-苄氧基通过催化氢解裂解,得到1- [α-(羧基)-4-羟基苄基]-3β-氨基吖丁啶-2-酮的酯。 3β-氨基酯可用于制备抗生素FR1923(诺卡霉素)。