Labeling and Natural Post-Translational Modification of Peptides and Proteins via Chemoselective Pd-Catalyzed Prenylation of Cysteine
作者:Thomas Schlatzer、Julia Kriegesmann、Hilmar Schröder、Melanie Trobe、Christian Lembacher-Fadum、Simone Santner、Alexander V. Kravchuk、Christian F. W. Becker、Rolf Breinbauer
DOI:10.1021/jacs.9b08279
日期:2019.9.18
The prenylation of peptides and proteins is an important post-translational modification observed in vivo. We report that the Pd-catalyzed Tsuji–Trost allylation with a Pd/BIPHEPHOS catalyst system allows the allylation of Cys-containing peptides and proteins with complete chemoselectivity and high n/i regioselectivity. In contrast to recently established methods, which use non-native connections,
of thiols with stable allylcarbonate and allylacetate reagents offers several advantages over established reactions for the formation of thioethers. We could demonstrate that Pd/BIPHEPHOS is a catalyst system which allows the transition metal-catalyzed S-allylation of thiols with excellent n-regioselectivity. Mechanistic studies showed that this reaction is reversible under the applied reaction conditions
Syntheses of perillene and natural congeners via Li2CuCl4-catalyzed cross-coupling reaction of allylic carbonates
作者:Ya-Nan Sun、Qi Wang、Ling He、Xi Wang、Wei-Dong Z. Li
DOI:10.1016/j.tetlet.2021.153610
日期:2022.2
Perillene is an essential ingredient in a Chinese patent drug and features some fascinating biological activities. We present herein an efficient pathway to perillene that hangs on the cross-couplingreaction of allylic carbonates with furfuryl Grignard reagent catalyzed by Li2CuCl4. The synthetic applications of this transformation were demonstrated by the synthesis of analogical natural products dendrolasin
紫苏烯是一种中成药的重要成分,具有一些令人着迷的生物活性。我们在此提出了一种有效的紫苏烯途径,该途径取决于由 Li 2 CuCl 4催化的烯丙基碳酸酯与糠基格氏试剂的交叉偶联反应。这种转化的合成应用通过合成类似的天然产物 dendrolasin、ambliofuran 和 thioperillene 得到证明。