Chemoselective Deprotection of Sulfonamides Under Acidic Conditions: Scope, Sulfonyl Group Migration, and Synthetic Applications
作者:Tomas Javorskis、Edvinas Orentas
DOI:10.1021/acs.joc.7b02507
日期:2017.12.15
Chemoselective acidic hydrolysis of sulfonamides with trifluoromethanesulfonic acid has been evaluated as a deprotection method and further extended to more complex synthetic applications. In contrast to conventional troublesome sulfonamide hydrolysis, a near-stoichiometric amount of acid was found to be sufficient to bring about efficient deprotection of various neutral or electron-deficient N-arylsulfonamides
α-C–H Functionalization of π-Bonds Using Iron Complexes: Catalytic Hydroxyalkylation of Alkynes and Alkenes
作者:Yidong Wang、Jin Zhu、Austin C. Durham、Haley Lindberg、Yi-Ming Wang
DOI:10.1021/jacs.9b11716
日期:2019.12.18
functionalization of C-Hbonds enables streamlined and sustainable solutions to problems in synthetic organic chemistry. In this Communication, we disclose an iron-based catalytic system for the functionalization of propargylic and allylic C-Hbonds. Inexpensive and readily-available cyclopentadienyliron(II) dicarbonyl complexes were employed as catalysts for a novel deprotonative activation mode for C-H functionalization
发现基于地球丰富的过渡金属的催化体系用于 CH 键的功能化,为合成有机化学中的问题提供了简化和可持续的解决方案。在本通讯中,我们公开了一种用于炔丙基和烯丙基 CH 键功能化的铁基催化系统。廉价且容易获得的环戊二烯基 (II) 二羰基配合物被用作 CH 官能化的新型去质子活化模式的催化剂,这种方法允许不饱和结构单元与芳基醛和其他羰基亲电子试剂直接结合,以提供一系列不饱和的在操作简单和官能团耐受反应条件下的醇偶联产物。
Designed Iron Catalysts for Allylic C−H Functionalization of Propylene and Simple Olefins
作者:Ruihan Wang、Yidong Wang、Ruiqi Ding、Parker B. Staub、Christopher Z. Zhao、Peng Liu、Yi‐Ming Wang
DOI:10.1002/anie.202216309
日期:2023.3
complex was discovered to enable the coupling of the allylic carbon of propylene and carbonyl electrophiles. This approach was also successfully applied to allylic C−H functionalization of simple olefins. Experimental and computationalstudies provided insights into the mechanism and origins of ligand effects on reactivity and diastereoselectivity.
申请人:UNIVERSITY OF PITTSBURGH - OF THE COMMONWEALTH SYSTEM OF HIGHER EDUCATION
公开号:US20240083932A1
公开(公告)日:2024-03-14
The invention includes a cationic cyclopentadienyliron dicarbonyl complex according to the general structure (I):
wherein, Y is (CH
2
)
n
or (CH
2
)
m
A(CH
2
)
n
, A is O, NSO
2
R, S, or CR
1
R
2
, each of R, R
1
and R
2
with respect to A is independently alkyl or aryl, n is an integer from 1 to 8, m+n is an integer from 2 to 7, Z is alkyl, aryl, heteroaryl, or CF
3
, and X is BF
4
−
, ClO
4
−
, PF
6
−
, AsF
6
−
, or SbF
6
−
.