在此,我们报告了一种前所未有的吲哚系链β-氨基丙烯酸酯的分子内交叉亲核偶联策略,该策略使用结合λ 3 -碘烷和路易斯酸的催化剂体系来实现三种独特生物碱骨架的化学发散合成。值得注意的是,螺二氢吲哚和氮杂[4,5- b ]吲哚衍生物的获得可以通过路易斯酸的选择进行切换。此外,含有内酯片段的多环螺二氢吲哚也可以通过交叉亲核偶联级联分子内缩合序列首次获得。
Site-Selective Carbonylative Synthesis of Structurally Diverse Lactams from Heterocyclic Amines with TFBen as the CO Source
作者:Jun Ying、Qian Gao、Xiao-Feng Wu
DOI:10.1021/acs.joc.9b02114
日期:2019.11.1
A palladium-catalyzed site-selectiveC-Hcarbonylation of heterocyclic amines for the synthesis of lactam motifs has been developed. The reaction of 3-thiophene methylamines, 2-thiophene methylamines, and tryptamines with benzene-1,3,5-triyl triformate (TFBen) as the CO source provides a series of structurally diverse lactams in moderate to high yields with excellent regioselectivities.
transannulation strategy using readily available tryptamines. Molecular oxygen and water are used as oxygen sources and provide direct access to the donaxaridine scaffold and its derivatives. This methodology is applied to the efficient synthesis of the natural products donaxaridine, chimonamidine, donaxanine, donaxarine, and aline in just one or two steps. The tryptamines, albeit with oxy-sensitive dialkyl N-H
IMAGING HISTONE DEACETYLASES WITH A RADIOTRACER USING POSITRON EMISSION TOMOGRAPHY
申请人:THE GENERAL HOSPITAL CORPORATION
公开号:US20160271276A1
公开(公告)日:2016-09-22
Disclosed herein are histone deacetylase imaging agents for positron emission tomography and related imaging methods using the histone deacetylase imaging agents. The histone deacetylase imaging agents may be a compound of formula (I): wherein R
1
is a moiety including a positron emitter; R
2
represents hydrogen, or substituted or unsubstituted alkyl, or substituted or unsubstituted aryl, or substituted or unsubstituted heteroaryl; and n is an integer selected from 0 or 1. In one version of the compound of formula (I), R
1
is a moiety including an adamantyl group.