Complexes of selected late period lanthanide(III) cations with 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid amide (DOTAM)-alkyl ligands — A new platform for the development of paramagnetic chemical exchange saturation transfer (PARACEST) magnetic resonance imaging (MRI) contrast agents
[EN] COMPOUNDS AND THEIR USE AS PDE4 ACTIVATORS<br/>[FR] COMPOSÉS ET LEUR UTILISATION EN TANT QU'ACTIVATEURS DE PDE4
申请人:MIRONID LTD
公开号:WO2018060704A1
公开(公告)日:2018-04-05
Compounds of Formula (I), which are activators of long form cyclic nucleotide phosphodiesterase-4 (PDE4) enzymes (isoforms) are provided. Methods and uses of these compounds for the treatment or prevention of disorders requiring a reduction of second messenger responses mediated by cyclic 3', 5'-adenosine monophosphate (cAMP) are also described. (Formula (I))
Formula (I)的化合物是长形环核苷酸磷酸二酯酶-4(PDE4)酶(同工酶)的激活剂。还描述了这些化合物用于治疗或预防需要通过环3',5'-腺苷酸单磷酸(cAMP)介导的第二信使反应减少的疾病的方法和用途。
Assessment of reagents for selenocysteine conjugation and the stability of selenocysteine adducts
作者:Lee Pedzisa、Xiuling Li、Christoph Rader、William R. Roush
DOI:10.1039/c6ob00775a
日期:——
circulatory stability, which can result in premature drug release with consequent off-target toxicities. Selenocysteine-modified antibodies have been developed that allow site-specific antibody conjugation, yielding homogeneous ADCs. Herein, we survey several electrophilic functional groups that react with selenocystine with high efficiency. Several of these result in conjugates with stabilities that are
[reaction: see text] Allylzirconium reagents are effective for radicalallylation of alpha-halo carbonyl compounds. The key steps would be homolytic cleavage of the zirconium-carbon bond and halogen abstraction by the resulting Cp(2)ZrCl(III). Zirconocene-olefin complex can be also utilized for the allylation of alpha-halo compounds.
Treatment of silyl enolates with methyllithium followed by an addition of galliumtrichloride afforded the corresponding gallium enolates. The reaction of the resulting gallium enolates with α-halo carbonyl compounds in the presence of triethylborane as a radical initiator provided 1,4-dicarbonyl compounds in good yields.
Total Synthesis of (±)-Deethylibophyllidine: Studies of a Fischer Indolization Route and a Successful Approach via a Pummerer Rearrangement/Thionium Ion-Mediated Indole Cyclization
作者:Josep Bonjoch、Juanlo Catena、Nativitat Valls
DOI:10.1021/jo960848z
日期:1996.1.1
derivatives, the regioselective Fischer indolization to obtain octahydropyrrolo[3,2-c]carbazoles, and the tandem process consisting of Pummerer rearrangement upon a beta-amino sulfoxide and thionium ion cyclization upon a beta-indole position of a 2,3-disubstituted indole to generate the quaternary spiro center. Attempts to effect the construction of the pentacyclic framework by means of Fischer indolization