Pd-Catalyzed Carbonylation of Vinyl Triflates To Afford α,β-Unsaturated Aldehydes, Esters, and Amides under Mild Conditions
作者:Shaoke Zhang、Helfried Neumann、Matthias Beller
DOI:10.1021/acs.orglett.9b00765
日期:2019.5.17
An efficient and general protocol for the synthesis of α,β-unsaturated aldehydes, esters, and amides via carbonylation of vinyl triflates including derivatives of camphor, ketoisophorone, verbenone, and pulegone was developed. Crucial for these transformations is the use of a specific palladium catalyst containing a pyridyl-substituted dtbpx-type ligand. This procedure also allows for an easy access
开发了一种有效的通用方案,可通过乙烯基三氟甲磺酸酯的羰基化反应合成α,β-不饱和醛,酯和酰胺,包括樟脑,酮异佛尔酮,马鞭草酮和普乐酮。这些转化的关键是使用含有吡啶基取代的d t bpx型配体的特定钯催化剂。该方法还使得容易从相应的酮获得二羰基化产物。
CYCLIC AMINOMETHYL PYRIMIDINE DERIVATIVE
申请人:SUMITOMO DAINIPPON PHARMA CO., LTD.
公开号:US20160122319A1
公开(公告)日:2016-05-05
The present invention provides a cyclic aminomethyl pyrimidine derivative and a pharmaceutically acceptable salt thereof with high selectivity for dopamine D
4
receptors, which are useful for treating a disease such as attention deficit hyperactivity disorder. Specifically, a compound of formula (1) or a pharmaceutically acceptable salt thereof is provided, wherein n and m are independently 1 or 2; R
a
is C
1-6
alkyl group, C
3-6
cycloalkyl group, or amino group; R
b
is hydrogen atom, C
1-6
alkyl group or the like, provided that when R
a
is amino group, then R
b
is hydrogen atom; R
c1
and R
c2
are independently hydrogen atom, or C
1-6
alkyl group; R
d1
and R
d2
are independently hydrogen atom, fluorine atom or the like; ring Q is an optionally-substituted pyridyl group or an optionally-substituted isoquinolyl group; and the bond having a dashed line is a single or double bond.
Palladium-catalyzed formylation of organic halides with carbon monoxide and tin hydride
作者:Victor P. Baillargeon、J. K. Stille
DOI:10.1021/ja00263a015
日期:1986.2
La formylation catalysee par le palladium d'une variete de substrats organiques (iodoarenes, halogenures benzyliques, iodures vinyliques, triflates de vinyles et halogenures allyliques) avec le tributylstannane et le monoxyde de carbone donne les aldehydes avec de bons rendements dans des conditions douces et tolere un certain nombre de groupes fonctionnels
La formylation catalysee par le palladium d'une variete de substrats Organics特定的团体名称
Palladium-Catalyzed Cross-Coupling Reaction of Bis(pinacolato)diboron with 1-Alkenyl Halides or Triflates: Convenient Synthesis of Unsymmetrical 1,3-Dienes via the Borylation-Coupling Sequence
1-alkenylboronic acid pinacol esters via a palladium-catalyzed cross-coupling reaction of bis(pinacolato)diboron (pin(2)B(2), pin = Me(4)C(2)O(2)) with 1-alkenyl halides or triflates was carried out in toluene at 50 degrees C in the presence of KOPh (1.5 equiv) and PdCl(2)(PPh(3))(2)-2Ph(3)P (3 mol %). The borylation of acyclic and cyclic 1-alkenyl bromides and triflates was achieved in high yields with complete
Conversion of Cyclic Ketones to 2,3-Fused Pyrroles and Substituted Indoles
作者:Joshua S. Alford、Jillian E. Spangler、Huw M. L. Davies
DOI:10.1021/ja405043g
日期:2013.8.14
A highly effective synthesis of 2,3-fused pyrroles from cyclicketones has been achieved. The transformation includes a rhodium-catalyzed reaction of 4-alkenyl-1-sulfonyl-1,2,3-triazoles featuring an unusual 4π electrocyclization. The methodology was further extended to the synthesis of indoles using a one-pot reaction starting from 1-ethynylcyclohexenes.