CAS: 25659-31-8; Lead(2+),Diiodate

专利信息

专利号:US-12168649-B2
优先权日:2018-08-17
标 题 :Synthesis of chromanol and 2-methyl-1,4-naphthoquinone derivatives
发明人：WEINGARTEN MELANIE; SIEGEL WOLFGANG; PUHL MICHAEL
权利人:BASF SE
摘要:The present invention relates to a process for the production of chromanol and 2-methyl-1,4-naphthoquinone derivatives, more specifically to a process for preparing a compound of the general formula (I) or (II) wherein the variables are as defined in the claims and the description.

专利号:WO-2012093402-A1
优先权日:2011-01-04
标题:Processes for the preparation of n-[2-(7-methoxy-1-naphthyl)ethyl]acetamide
发明人：MOHAN RAO DODDA; KRISHNA REDDY PINGILI; ANNA REDDY AMBATI
权利人:SYMED LABS LTD; MOHAN RAO DODDA; KRISHNA REDDY PINGILI; ANNA REDDY AMBATI
摘要:The present invention relates to processes for the synthesis of N-[2-(7-methoxy-l - naphthethyl] acetamide, amorphous form of N-[2-(7-methoxy-l -naphthethyl] acetamide and pharmaceutical compositions thereof.

专利号:US-9505621-B2
优先权日:2013-03-19
标 题:Synthesis of length-selected carbon nanotubes
发明人：NICHOLAS NOLAN; CARNAHAN DAVID
权利人:NANOLAB INC
摘要:A method for producing carbon nanotubes having specific lengths, said method comprising:n producing carbon nanotubes having at least two types of zones along their lengths, wherein each zone type has a characteristic structure that confers specific properties; and processing said carbon nanotubes to selectively attack one zone type more aggressively than another zone type.

专利号:US-9382194-B2
优先权日:2011-10-31
标 题:Iodination process for the preparation of 3, 5-disubstituted-2, 4, 6-triiodo aromatic amines compounds
发明人：XING HONGDENG; LI LEI; HU ZHIQI
权利人:XING HONGDENG; LI LEI; HU ZHIQI; IMAX DIAGNOSTIC IMAGING HOLDING LTD
摘要:The invention discloses a improved process for the preparation of 3,5-disubstituted-2,4,6-triiodo aromatic amines of formula (II), wherein R 1 and R 2 are defined as herein. The compounds of formula (II) are the key intermediates for the synthesis of a series of non-ionic contrast agents such as Iopamidol, Iohexol and Iodixanol. The process comprises reacting chlorine-free iodinating reagents with 3,5-disubstituted-2,4,6-triiodo aromatic amines to obtain 3,5-disubstituted-2,4,6-triiodo aromatic amines of formula (II), wherein the molar yield of the iodination reaction can reach to 89%.

专利号:US-8766003-B2
优先权日:2010-06-10
标题 :Process for the iodination of phenolic derivatives
发明人：CITTERIO ATTILIO; BATTISTINI ELISA; BELNOME DAVIDE; BUONSANTI FEDERICA; LATTUADA LUCIANO; LEONARDI GABRIELLA; UGGERI FULVIO; VIGNALE EVELIN; VISIGALLI MASSIMO
权利人:CITTERIO ATTILIO; BATTISTINI ELISA; BELNOME DAVIDE; BUONSANTI FEDERICA; LATTUADA LUCIANO; LEONARDI GABRIELLA; UGGERI FULVIO; VIGNALE EVELIN; VISIGALLI MASSIMO; BRACCO IMAGING SPA
摘要:The present invention relates to a process for the preparation of iodinated phenols; in particular; it relates to a process including the direct iodination, with suitably activated iodine, of 3,5-disubstituted phenol compounds to the corresponding 3,5-disubstituted-2,4,6-triiodophenols, which are useful intermediates for the synthesis of x-ray contrast media, and to the preparation of the contrast media themselves.

专利号:US-5473085-A
优先权日:1994-07-22
标题:Production of (-)dodecahydro-3a,6,6,9a-tetramethyl-naphtho[2,1-b] furan
发明人：BARTON DEREK H R; TAYLOR DENNIS K; TSE CHI-LAM
权利人:QUEST INT
摘要:Preparation of a methyl ketone intermediate useful in the synthesis of (-)-dodecahydro-3a,6,6, 9a-tetramethyl-naphtho(2,1-b) furan by subjecting (-)-sclareol to ozonolysis in the presence of iodine or iodine-containing compound. The intermediate can be converted to (-)-dodecahydro-3a,6,6,9a-tetramethyl-naphtho(2,1-b) furan by Baeyer-Villiger oxidation followed by reduction of the resulting product in the presence of a Lewis acid.