Alkenylation and Arylation of Peptides via Ni-Catalyzed Reductive Coupling of α-<i>C</i>-Tosyl Peptides with Csp<sup>2</sup> Triflates/Halides
作者:Xianghua Tao、Guobin Ma、Yanhong Song、Yunrong Chen、Qun Qian、Deli Sun、Hegui Gong
DOI:10.1021/acs.orglett.1c02601
日期:2021.10.1
A Ni-catalyzed reductive cross-coupling between α-C-tosyl peptides and Csp2 triflates/halides has been developed. This protocol enables the formation of various unnatural di- and tripeptides containing vinyl and aryl side chains, and it expands the applications of Ni-catalyzed reductive cross-coupling in late-stage diversification of peptides.
已经开发了α-C-甲苯磺酰肽和 Csp 2三氟甲磺酸盐/卤化物之间的 Ni 催化还原交叉偶联。该协议能够形成各种含有乙烯基和芳基侧链的非天然二肽和三肽,并扩展了镍催化还原交叉偶联在肽后期多样化中的应用。
Cyclic Alkenylsulfonyl Fluorides: Palladium‐Catalyzed Synthesis and Functionalization of Compact Multifunctional Reagents
作者:Terry Shing‐Bong Lou、Scott W. Bagley、Michael C. Willis
DOI:10.1002/anie.201910871
日期:2019.12.19
A series of low-molecular-weight, compact, and multifunctional cyclic alkenylsulfonyl fluorides were efficiently prepared from the corresponding alkenyl triflates. Palladium-catalyzed sulfur dioxide insertion using the surrogate reagent DABSO effects sulfinateformation, before trapping with an F electrophile delivers the sulfonyl fluorides. A broad range of functional groups are tolerated, and a correspondingly
A novel palladium-catalyzed synthesis of β-carbolines: application in total synthesis of naturally occurring alkaloids
作者:Shubhada W Dantale、Björn C.G Söderberg
DOI:10.1016/s0040-4020(03)00824-x
日期:2003.7
Two naturallyoccurring β-carbolines, 6-methoxy-2-methyl-1,2,3,4-tetrahydro-β-carboline and bauerine A, have been prepared using a Stille-type coupling, followed by a palladium-phosphine catalyzed N-heteroannulation as the key steps.
Cross‐Electrophile C(sp
<sup>2</sup>
)−Si Coupling of Vinyl Chlorosilanes
作者:Jicheng Duan、Ke Wang、Guang‐Li Xu、Shaolin Kang、Liangliang Qi、Xue‐Yuan Liu、Xing‐Zhong Shu
DOI:10.1002/anie.202010737
日期:2020.12.14
C−Si bond remains unexplored. Here we report a cross‐electrophile Csp2‐Si coupling reaction of vinyl/aryl electrophiles with vinyl chlorosilanes. This new protocol offers an approach for facile and precise synthesis of organosilanes with high molecular diversity and complexity from readily available materials. The reaction proceeds under mild and non‐basic conditions, demonstrating a high step economy
Functionalized angular cycloalkane-fused naphthalenes were prepared using a two-step process involving a Pd-catalyzed Suzuki–Miyaura coupling of aryl pinacol boronates and vinyl triflates followed by a boron trifluoride etherate-catalyzed cycloaromatization.