(−)-Complanine, an inflammatory substance of marine fireworm: a synthetic study
作者:Kazuhiko Nakamura、Yu Tachikawa、Daisuke Uemura
DOI:10.3762/bjoc.5.12
日期:——
The synthesis of (−)-complanine, an inflammatory substance of Eurythoe complanata, was accomplished by a “chiral synthon” approach. The absolute configuration of this molecule was determined to be R.
(-)-Cylindricine C has been synthesized from commercially available (S)-(-)-1,2,4-butanetriol in 11 steps with an overall yield of 12%. The key step utilizes a CrCl2 reduction of an azide to form the corresponding amine with a subsequent double Michael addition to create the tricyclic skeleton of cylindricine from a monocyclic substrate.
Synthesis, <sup>18</sup>F-Radiolabeling, and in Vivo Biodistribution Studies of <i>N</i>-Fluorohydroxybutyl Isatin Sulfonamides using Positron Emission Tomography
respectively), which makes them appropriate PET radiotracer candidates. Therefore, N-(4-[18F]fluoro-3(R)-hydroxybutyl)- and N-(3(S)-[18F]fluoro-4-hydroxybutyl)-5-[1-(2(S)-(methoxymethyl)pyrrolidinyl)sulfonyl]isatin were synthesized in 140 min with 24% and 10% overall radiochemical yields and specific activities of 10–127 GBq/μmol using [18F]fluoride in the presence of Kryptofix and subsequent acidic hydrolysis