Selective carbene transfer to amines and olefins catalyzed by ruthenium phthalocyanine complexes with donor substituents
作者:Lucie P. Cailler、Andrey P. Kroitor、Alexander G. Martynov、Yulia G. Gorbunova、Alexander B. Sorokin
DOI:10.1039/d0dt04090h
日期:——
Electron-rich ruthenium phthalocyanine complexes were evaluated in carbene transfer reactions from ethyl diazoacetate (EDA) to aromatic and aliphatic olefins as well as to a wide range of aromatic, heterocyclic and aliphatic amines for the first time. It was revealed that the ruthenium octabutoxyphthalocyanine carbonyl complex [(BuO)8Pc]Ru(CO) is the most efficient catalyst converting electron-rich
富电子钌酞菁配合物是首次从重氮乙酸乙酯(EDA)到芳香族和脂肪族烯烃以及各种芳香族,杂环和脂肪族胺的卡宾转移反应中进行评估的。结果表明,八丁氧基酞菁钌羰基络合物[(BuO)8Pc] Ru(CO)是最有效的催化剂,在低催化剂负载和几乎等摩尔的底物条件下,可以将高电子含量和电子贫乏的芳族烯烃转化为环丙烷衍生物,并具有高收率(通常为80–100%)和高TON(最高为1000)。 / EDA比。该催化剂在卡宾插入胺N–H键中显示出罕见的效率。使用0.05摩尔%的催化剂负载量,高胺浓度(1M)和1.1当量。在EDA的作用下,许多结构不同的胺被选择性地转化为单取代的甘氨酸衍生物,其定量收率和周转数均达到2000。高选择性,大底物范围,低催化剂载量和实际反应条件[[BuO)8 Pc ] Ru(CO)是卡宾插入胺中最有效的催化剂。
Engineering of RuMb: Toward a Green Catalyst for Carbene Insertion Reactions
作者:Matthew W. Wolf、David A. Vargas、Nicolai Lehnert
DOI:10.1021/acs.inorgchem.6b03148
日期:2017.5.15
The small, stable hemeprotein myoglobin (Mb) was modified through cofactor substitution and mutagenesis to develop a new catalyst for carbene transfer reactions. The native heme was removed from wild-type Mb and several Mb His64 mutants (H64D, H64A, H64V), and the resulting apoproteins were reconstituted with ruthenium mesoporphyrin IX (RuMpIX). The reconstituted proteins (RuMb) were characterized
Chemoselective Cyclopropanation over Carbene Y–H Insertion Catalyzed by an Engineered Carbene Transferase
作者:Eric J. Moore、Viktoria Steck、Priyanka Bajaj、Rudi Fasan
DOI:10.1021/acs.joc.8b00946
日期:2018.7.20
biocatalysts for promoting a variety of carbene transfer reactions including cyclopropanation and Y–H insertion (Y = N, S, Si, B). For these and synthetic carbene transfer catalysts alike, achieving high chemoselectivity toward cyclopropanation in olefin substrates bearing unprotected Y–H groups has proven remarkably challenging due to competition from the more facile carbene Y–H insertion reaction. In this
Cytochrome P450-catalyzed insertion of carbenoids into N–H bonds
作者:Z. Jane Wang、Nicole E. Peck、Hans Renata、Frances H. Arnold
DOI:10.1039/c3sc52535j
日期:——
Expanding nature's catalytic repertoire to include reactions important in synthetic chemistry will open new opportunities for âgreenâ chemistry and biosynthesis. We demonstrate the first enzyme-catalyzed insertion of carbenoids into NâH bonds. This type of bond disconnection, which has no counterpart in nature, can be mediated by variants of the cytochrome P450 from Bacillus megaterium. The NâH insertion reaction takes place in water, provides the desired products in 26â83% yield, forms the single addition product exclusively, and does not require slow addition of the diazo component.
Substitution pattern in ruthenium octa-n-butoxyphthalocyanine complexes influence their reactivity in N–H carbene insertions
作者:Andrey P. Kroitor、Alexander A. Dmitrienko、Alexander G. Martynov、Yulia G. Gorbunova、Alexander B. Sorokin
DOI:10.1039/d2ob01861f
日期:——
complexes bearing n-OBu substituents in the peripheral or non-peripheral positions are efficient catalysts for the selective double or single carbene insertion to the amine N–H bonds. This complementary reactivity of two Ru complexes can be used for the synthesis of asymmetric tertiary amines and diamines bearing different substituents and has been demonstrated by two examples of readily available primary