[EN] CYCLOHEXYL SULPHONE DERIVATIVES AS GAMMA-SECRETASE INHIBITORS [FR] UTILISATION DE DERIVES DE CYCLOHEXYLE SULFONE COMME INHIBITEURS DE LA GAMMA-SECRETASE
Synthesis of<i>N</i>-[1-(2-Hydroxyethyl)-1<i>H</i>-tetrazol-5-yl]-<i>N</i>-methylhydrazine as Polymeric Precursor
作者:Klaus Banert、Thomas M. Klapötke、Stefan M. Sproll
DOI:10.1002/ejoc.200800764
日期:2009.1
nitrogen-rich polymer was formed from the reaction of hexamethylene diisocyanate and N-[1-(2-hydroxyethyl)-1H-tetrazol-5-yl]-N-methylhydrazine (3) monomers. Compound 3 was synthesized by a nucleophilic substitution of the methylated sulfur atom of 4-[2-(acetoxy)ethyl]-2-methylthiosemicarbazide (10) with sodium azide and final deprotection of the formed N-[1-2-(acetoxyethyl)-1H-tetrazol-5-yl]-N-methylhydrazine
Thienopyrimidine compounds, their production and use
申请人:Takeda Chemical Industries, Ltd.
公开号:US06340686B1
公开(公告)日:2002-01-22
A compound of the formula:
wherein R1 and R2 each is hydrogen, hydroxy, C1-4 alkoxy, C1-4 alkoxy-carbonyl or C1-4 alkyl which may be substituted; R3 is hydrogen, halogen, hydroxy or C1-4 alkoxy which may be substituted; or adjacent two R3 may form C1-4 alkylenedioxy; R4 is hydrogen or C1-4 alkyl; R6 is C1-4 alkyl which may be substituted or a group of the formula:
wherein R5 is hydrogen or R4 and R5 may form heterocycle; and n is 0-5, or a salt thereof, has an excellent GnRH-antagonizing activity, and is useful for preventing or treating sex hormone-dependent diseases.
diaziridine 2c is rearranged in these conditions with ring-expansion. Complete asymmetric transformation has been found to take place on the formation of the solid phase of diastereomers 2d and 2j, and a closed cycle of diastereomeric transformations has been accomplished. Diaziridine 2g with chiral centres only at the nitrogen atoms has been obtained with the optical purity of 85.5% by resolution via