<scp>Pd‐Catalyzed</scp>
Asymmetric Synthesis of 3,
<scp>4‐Dihydroisoquinolinones</scp>
From
<scp>
<i>N</i>
‐Ts‐Benzamides
</scp>
and 1,
<scp>3‐Dienes</scp>
作者:Tae Kyun Kim、So Won Youn
DOI:10.1002/bkcs.12227
日期:2021.3
A Pd(II)‐catalyzed asymmetric oxidative annulation of N‐Ts‐benzamides with 1,3‐dienes using a chiral pyridine‐oxazoline‐type ligand for the regio‐ and stereoselective synthesis of chiral 3,4‐dihydroisoquinolinones has been developed.
Rhodium-Catalyzed Dehydrogenative Cycloisomerization of Dienylcyclopropane to Highly Substituted Toluene
作者:Wo Nie、Shichao Shen、Cheng Ma
DOI:10.1021/acs.orglett.1c01265
日期:2021.6.4
A rhodium-catalyzed dehydrogenative cycloisomerization of dienylcyclopropane compounds is reported, which provides a straightforward approach to a variety of highly substituted toluene derivatives in 67–85% yields. The dienylcyclopropane-imides are produced by a single-step formal three-component olefination procedure. Preliminary mechanistic studies indicated that an electron-withdrawing group as
报道了铑催化的二烯基环丙烷化合物的脱氢环异构化,它为各种高度取代的甲苯衍生物提供了一种直接的方法,产率为 67-85%。二烯基环丙烷-酰亚胺通过一步正式的三组分烯化程序生产。初步的机理研究表明,作为 R 的吸电子基团在完成这种转变中起着关键作用。
Rh(III)-Catalyzed Defluorinative [4 + 2] Annulation of <i>N</i>-Sulfonylarylamides with Ethyl 2-Diazo-3,3,3-trifluoropropanoate: Synthesis of 1,3,4-Functionalized Isoquinolines
作者:Haosheng Li、Mingjing Mei、Lei Zhou
DOI:10.1021/acs.orglett.2c03501
日期:2022.12.16
3,3-trifluoropropanoate as a nontraditional two-carbon reaction partner, a Rh(III)-catalyzed defluorinative [4 + 2] annulation for the synthesis of 1,3,4-functionalized isoquinolines was developed. The reaction proceeds by sequential C–H carbenoid insertion, dual C–F bond cleavage/annulation, and N– to O–sulfonyl migration. The resultant products were converted to diverse 1,3,4-trisubstituted isoquinolines