Use of Formate Salts as a Hydride and a CO2 Source in PGeP-Palladium Complex-Catalyzed Hydrocarboxylation of Allenes
摘要:
Use of formate salts as a hydride as well as a CO2 source was achieved in a PGeP-palladium complex-catalyzed hydrocarboxylation of allenes through a highly efficient decarboxylationcarboxylation process. This reaction proceeds under mild conditions and provides an alternative strategy for utilizing formate salts as a C1 source.
开发了三齿 PSiP 钳形钯配合物在二氧化碳下催化丙二烯加氢羧化,得到合成有用的 β, γ-不饱和羧酸。这种新型的 CO2 固定反应被认为是通过丙二烯的氢化钯催化生成 σ-烯丙基钯物种,然后在适当的还原剂存在下将其区域选择性亲核加成到 CO2 中进行的。该反应成功应用于带有酯、氨基甲酸酯、酮和烯烃等官能团的各种丙二烯,显示出该方案的高合成效用。
Copper‐Catalyzed Bora‐Acylation and Bora‐Alkoxyoxalylation of Allenes
作者:Ayumi Sawada、Tetsuaki Fujihara、Yasushi Tsuji
DOI:10.1002/adsc.201800311
日期:2018.7.16
Bora‐acylation of allenes proceeds in the presence of a copper catalyst using B2(pin)2 and carboxylic anhydrides as boron and acyl sources, respectively. The reaction selectively affords the corresponding β‐boryl‐β,γ‐unsaturated ketones in good‐to‐high yields. Bora‐alkoxyoxalylation of an allene is also achieved using oxalates.
The boraformylation of allenes with B2(pin)2 and a formate ester as boron and formyl source, respectively, proceeds in the presence of a copper catalyst. The reaction selectively affords the corresponding β‐boryl β,γ‐unsaturated aldehydes in good to high yields. Furthermore, the silaformylation of allenes was achieved with a formate ester and PhMe2Si−B(pin) as the silicon source.
METHODS OF MAKING COMPOUNDS HAVING A BETA-ADRENERGIC INHIBITOR AND A LINKER AND METHODS OF MAKING COMPOUNDS HAVING A BETA-ADRENERGIC INHIBITOR, A LINKER AND A PHOSPHODIESTERASE INHIBITOR
申请人:Chen Gang
公开号:US20080262226A1
公开(公告)日:2008-10-23
A method is provided for making compounds comprising a beta-adrenergic inhibiting moiety and a linking moiety, the method comprising: a) reacting a compound of formula (A): (R
1
—(CH—O—CH
2
)) with at least one of NH
3
, NH
4
, NH
4
ClNH
3
and R
12′
NH
2
thereby forming a compound of formula (B): (R
1
—CH(OH)—CH
2
—NHR
12′
); and b) reacting a compound of formula (B) with a compound of formula (C): (R
3
═O), thereby forming a compound of formula (D): (R
1
—COH—CH
2
—N(R
3
)(R
12′
)), wherein R
1
comprises the beta-adrenergic inhibiting moiety or comprises the beta-adrenergic inhibiting moiety when bonded to —COH—CH
2
—N(R
12′
)— of formula (D); R
3
comprises the linking moiety and is bonded to the =0 of formula (C) via a carbon atom; and R
12′
is selected from hydrogen and a protecting group.
Hydrocarboxylation of Allenes with CO<sub>2</sub> Catalyzed by Silyl Pincer-Type Palladium Complex
作者:Jun Takaya、Nobuharu Iwasawa
DOI:10.1021/ja806677w
日期:2008.11.19
complex-catalyzed hydrocarboxylation of allenes under carbon dioxide to give synthetically useful beta,gamma-unsaturated carboxylic acids was developed. This novel CO2-fixation reaction is thought to proceed through the catalytic generation of sigma-allyl palladium species via hydropalladation of allenes, followed by its regioselective nucleophilic addition to CO2 in the presence of an appropriate
开发了三齿 PSiP 钳形钯配合物在二氧化碳下催化丙二烯加氢羧化,得到合成有用的 β, γ-不饱和羧酸。这种新型的 CO2 固定反应被认为是通过丙二烯的氢化钯催化生成 σ-烯丙基钯物种,然后在适当的还原剂存在下将其区域选择性亲核加成到 CO2 中进行的。该反应成功应用于带有酯、氨基甲酸酯、酮和烯烃等官能团的各种丙二烯,显示出该方案的高合成效用。
Use of Formate Salts as a Hydride and a CO<sub>2</sub> Source in <i>PGeP</i>-Palladium Complex-Catalyzed Hydrocarboxylation of Allenes
作者:Chuan Zhu、Jun Takaya、Nobuharu Iwasawa
DOI:10.1021/acs.orglett.5b00692
日期:2015.4.3
Use of formate salts as a hydride as well as a CO2 source was achieved in a PGeP-palladium complex-catalyzed hydrocarboxylation of allenes through a highly efficient decarboxylationcarboxylation process. This reaction proceeds under mild conditions and provides an alternative strategy for utilizing formate salts as a C1 source.