Thioalkylation of nucleoside-H-phosphonates and its application to solid phase synthesis of oligonucleotides
摘要:
A facile method for the thioalkylation of H-phosphonate diesters is presented. It can be used in the solid phase synthesis of oligonucleotides according to the H-phosphonate method.
A simple, efficient, and odorless deborylthiolation of aryl- and alkenylborons with thiosulfonates has been achieved under mild conditions using a copper catalyst.
Copper‐catalyzed sequential 1,3‐dipolarcycloadditions of azomethine imines and alkynes and electrophilic thiolations are described. The C−S, C−N, and C−C bonds were simultaneously formed in one pot, leading to N,N‐bicyclic pyrazolidinones in good to excellent yields. The process is proposed to proceed via reaction of a cuprate pyrazolidinonate intermediate and benzenesulfonothioate.
Short Total Synthesis of Ajoene, (
<i>E</i>
,
<i>Z</i>
)‐4,5,9‐Trithiadodeca‐1,6,11‐triene 9‐oxide, in Batch and (
<i>E</i>
,
<i>Z</i>
)‐4,5,9‐Trithiadodeca‐1,7,11‐triene in Continuous Flow
作者:Marina Yamamoto Raynbird、Filipa Silva、Harry Smallman、Shaista S. Khokhar、Daniel Neef、Gareth J. S. Evans、Thomas Wirth
DOI:10.1002/chem.202001598
日期:2020.7.8
A short total synthesis of ajoene, (E,Z )‐4,5,9‐trithiadodeca‐1,6,11‐triene 9‐oxide, has been achieved over six steps. In addition, a continuous flow synthesis under mild reaction conditions to (E,Z )‐4,5,9‐trithiadodeca‐1,7,11‐triene is described starting from simple and easily accessible starting materials. Over four steps including propargylation, radical addition of thioacetate, deprotection, and
Structure–activity studies on the anti-proliferation activity of ajoene analogues in WHCO1 oesophageal cancer cells
作者:Catherine H. Kaschula、Roger Hunter、Nashia Stellenboom、Mino R. Caira、Susan Winks、Thozama Ogunleye、Philip Richards、Jonathan Cotton、Kani Zilbeyaz、Yabing Wang、Vuyolwethu Siyo、Ellen Ngarande、M. Iqbal Parker
DOI:10.1016/j.ejmech.2012.01.058
日期:2012.4
organosulfur compound ajoene derived from the rearrangement of allicin found in crushed garlic can inhibit the proliferation of tumour cells by inducing G2/M cell cycle arrest and apoptosis. We report on the application of a concise four-step synthesis (Hunter et al., 2008 [1]) that allows access to ajoene analogues with the end allyl groups substituted. A library of twelve such derivatives tested for