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公开(公告)号：US4841075A
公开(公告)日：1989-06-20
申请号：US129702
申请日：1987-12-07
IPC分类号： B01J21/00 , B01J21/06 , B01J23/14 , C07B61/00 , C07C41/00 , C07C41/50 , C07C41/56 , C07C43/30 , C07C43/303 , C07C67/00 , C07D317/12 , C07D317/16 , C07D317/18 , C07D317/20 , C07D317/44 , C07D317/72
CPC分类号： C07D317/72 , C07C41/56 , C07C41/58 , C07D317/12 , C07D317/16 , C07D317/20 , Y02P20/55
摘要： A method of preparing an acetal or ketal from a corresponding aldehyde or ketone is disclosed. A hydrous oxide of an element of Group IV of the Periodic Table is used as a catalyst, and the aldehyde or ketone is caused to react with an alcohol. The hydrous oxide can be obtained by partially dehydrating a hydroxide of the corresponding element. The method does not require an acid catalyst and is applicable to a carbonyl compound which is not stable in acids.
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公开(公告)号：US5041566A
公开(公告)日：1991-08-20
申请号：US578142
申请日：1990-09-06
申请人： Makoto Shibagaki , Kyoko Takahashi , Hideyuki Kuno , Ichiro Honda , Masataka Mori , Hajime Matsushita
发明人： Makoto Shibagaki , Kyoko Takahashi , Hideyuki Kuno , Ichiro Honda , Masataka Mori , Hajime Matsushita
IPC分类号： C07H15/203 , C07D493/08 , C07H19/01
CPC分类号： C07D493/08 , C07H19/01
摘要： Levoglucosenone is prepared by reaction sequence using 1,6-anhydro-.beta.-D-galactopyranose as a starting material. First, the starting material is reacted with ortho formate, obtaining an ortho ester of said starting material. Then, the ortho ester is placed under the conditions for a reductive elimination reaction of the ortho formate part of said ortho ester, thereby converting said ortho ester to a 1,6-anhydro-3,4-dideoxy derivative. The dideoxy derivative is placed under the conditions for oxidation of the hydroxy group of said dideoxy derivative, thereby forming levoglucosenone.
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公开(公告)号：US5210317A
公开(公告)日：1993-05-11
申请号：US768769
申请日：1991-10-17
CPC分类号： B01J21/066 , C07C45/29
摘要： Disclosed is a method of producing an aldehyde in which a primary alcohol is reacted with an oxidizing agent selected from the group consisting of ketone, aldehyde and quinone in the presence of a diluent which does not participate in the reaction, in the presence of a partially dehydrated zirconium hydroxide, so as to oxidize the primary alcohol into its corresponding aldehyde.
摘要翻译： PCT No.PCT / JP91 / 00184 Sec。 371日期1991年10月17日 102（e）日期1991年10月17日PCT 1991年2月15日提交PCT公布。 出版物WO91 / 12226 1991年8月22日公开。公开了一种制备醛的方法，其中伯醇在不参与反应的稀释剂的存在下与选自酮，醛和醌的氧化剂反应 在部分脱水的氢氧化锆的存在下，将伯醇氧化成其相应的醛。
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公开(公告)号：US5420286A
公开(公告)日：1995-05-30
申请号：US163531
申请日：1993-12-09
IPC分类号： B01D15/08 , C07B57/00 , C07D401/04 , C07H17/02 , C07D401/00
CPC分类号： C07D401/04 , C07H17/02
摘要： Disclosed is a method of obtaining (S)-(-)-3-(1-methyl-2-pyrrolidinyl)-2-pyridone (2) and (R)-(+)-3-(1-methyl-2-pyrrolidinyl)-2-pyridone (3) by resolving a racemic mixture of the compounds (2) and (3). More specifically, disclosed is a method of obtaining the optically active nicotine derivatives (2) and (3) shown below, which comprises steps of binding (.+-.)-3-(1-methyl-2-pyrrolidinyl)-2-pyridone to a sugar derivative, resolving the obtained compound into two types of stereoisomers, and treating them under an acidic condition. ##STR1##
摘要翻译： 公开了一种获得（S） - （ - ） - 3-（1-甲基-2-吡咯烷基）-2-吡啶酮（2）和（R） - （+） - 3-（1-甲基-2- 吡咯烷基）-2-吡啶酮（3），通过拆分化合物（2）和（3）的外消旋混合物。 更具体地，公开了获得以下所示的光学活性尼古丁衍生物（2）和（3）的方法，其包括将（+/-） - 3-（1-甲基-2-吡咯烷基）-2-吡啶酮 与糖衍生物反应，将所得化合物分解成两种立体异构体，并在酸性条件下进行处理。 （2）
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