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公开(公告)号:US4694941A
公开(公告)日:1987-09-22
申请号:US886146
申请日:1986-07-16
申请人: David A. Hall , Kenneth C. Yuergens
发明人: David A. Hall , Kenneth C. Yuergens
CPC分类号: F16H45/02 , F16H2045/0226 , F16H2045/0231 , F16H2045/0294
摘要: A drive hub for a torque converter lock-up clutch and damper assembly wherein a one-piece hub provides radial location for the driving and driven members and a pressure seal to provide the requisite pressure differential across the clutch pressure plate for application of the clutch during torque converter use.
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公开(公告)号:US4525304A
公开(公告)日:1985-06-25
申请号:US442052
申请日:1982-11-16
申请人: David A. Hall , Wayne A. Spitzer
发明人: David A. Hall , Wayne A. Spitzer
IPC分类号: C07D507/00 , C07D498/04 , C07D205/08
CPC分类号: C07D498/04
摘要: Compounds of the formula ##STR1## in which Y is hydrogen or hydroxyl, useful as intermediates in the production of antibiotics, are prepared by reacting a sulfinic acid of the formula ##STR2## with an oxidizing agent.
摘要翻译: 通过使式(IMAGE)+ TR< IMAGE>的亚磺酸与氧化的 代理商
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公开(公告)号:US4379739A
公开(公告)日:1983-04-12
申请号:US259316
申请日:1981-04-30
申请人: David A. Hall
发明人: David A. Hall
IPC分类号: C07D501/00 , C25B3/04 , C25B3/00
CPC分类号: C07D501/00 , C25B3/04
摘要: Deesterification of cephalosporin p-nitrobenzyl esters by electrolytic reduction.
摘要翻译: 通过电解还原对头孢菌素对硝基苄酯进行脱酯化。
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公开(公告)号:US4082627A
公开(公告)日:1978-04-04
申请号:US800674
申请日:1977-05-26
申请人: David A. Hall , Richard E. Heiney
发明人: David A. Hall , Richard E. Heiney
IPC分类号: C07D493/04 , C25B3/04
CPC分类号: C07D493/04 , C25B3/04
摘要: Dihydrobenzopyranoxanthenones of the formula ##STR1## are electrolytically reduced to their corresponding hexahydrobenzopyranoxanthenones at a mercury cathode in the presence of a proton source and in the presence of an electrolyte selected from the group consisting of alkali metal salts, quaternary ammonium salts having a total of about 10 to about 28 carbon atoms in the cation moiety, and tertiary amine salts having a total of about 7 to about 21 carbon atoms in the cation moiety.
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25.
公开(公告)号:US4042472A
公开(公告)日:1977-08-16
申请号:US676183
申请日:1976-04-12
申请人: David A. Hall
发明人: David A. Hall
CPC分类号: C25B3/04
摘要: 7-Acylamino-7-methoxycephalosporins substituted in the 3-position with an acetoxymethyl, halomethyl or 3-thio-substituted-methyl substituent are reduced electrolytically to provide the corresponding 3-exomethylenecepham compound. For example, 7-(2-thienylacetamido)-7-methoxy-3-acetoxymethyl-3-cephem-4-carboxylic acid is electrolytically reduced to provide 7-(2-thienylacetamido)-7-methoxy-3-exomethylenecepham-4-carboxylic acid and a lesser amount of the corresponding 3-methylcephalosporin compound.
摘要翻译: 在3-位被乙酰氧基甲基,卤代甲基或3-硫代取代的甲基取代基取代的7-酰基氨基-7-甲氧基头孢菌素被电解还原,得到相应的3-甲磺酰头孢烯化合物。 例如,7-(2-噻吩基乙酰胺基)-7-甲氧基-3-乙酰氧基甲基-3-头孢烯-4-羧酸被电解还原,得到7-(2-噻吩基乙酰氨基)-7-甲氧基-3-甲磺酰头孢-4-酮 羧酸和较少量的相应的3-甲基头孢菌素化合物。
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