01594nas a2200181   4500008004100000022001400041245008700055210006900142260011000211300001400321490000700335520085400342100002301196700002301219700002801242700002701270856011501297       2016                        eng d  a1463-926200aLigand-free Pd catalyzed cross-coupling reactions in an aqueous hydrotropic medium0 aLigandfree Pd catalyzed crosscoupling reactions in an aqueous hy  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcNOV  a1898-19110 v183 a<p>A simple, efficient and ligand-free protocol for the Suzuki-Miyaura reaction and base-free Heck-Matsuda reactions under mild reaction conditions have been developed over palladium supported on activated carbon (Pd/C) in an aqueous hydrotropic solution. The catalyst Pd/C was fully characterized by TG-DTA, SEM, EDS, XRD, XPS, BET and ICP-AES analyses. This green methodology represents a cost-effective and operationally convenient method for the synthesis of a variety of biaryls, prochiral ketones, and acrylates under the conditions that are tolerant for a broad range of functional groups with good to excellent yields. The developed Pd/C-aqueous hydrotrope combined catalytic system is well suited for the 3R approach (reducible, robust, and recyclable) for different cross-coupling reactions without an appreciable loss of its activity.</p>1 aJadhav, Sanjay, N.1 aKumbhar, Arjun, S.1 aRode, Chadrashekhar, V.1 aSalunkhe, Rajashri, S.  uhttp://library.ncl.res.in/content/ligand-free-pd-catalyzed-cross-coupling-reactions-aqueous-hydrotropic-medium01616nas a2200193   4500008004100000022001400041245014700055210006900202260000800271300001200279490000700291520087500298100002101173700002301194700002901217700002601246700002301272856012701295       2020                        eng d  a0340-428500aBio-surfactant: a green and environmentally benign reaction medium for ligand-free Pd-catalyzed Mizoroki-Heck cross-coupling reaction in water0 aBiosurfactant a green and environmentally benign reaction medium  cSEP  a403-4110 v453 a<p>A simple and efficient protocol for the ligand-free Mizoroki-Heck coupling reaction of various aryl bromides with different olefins has been reported by using in situ generated PdNPs of size 5-10 nm in aqueous solution of bio-surfactant. The bio-surfactant used in this study is a saponin extract of the seeds of pericarps (pods) of theAcacia concinnaplant. The in situ generated PdNPs have been characterized by various techniques such as HRTEM, EDS and XPS. The influence of various parameters such as the nature and amount of bases, the nature of Pd precatalysts as well as the effect of temperature has been investigated on Mizoroki-Heck coupling reaction. The generated PdNPs significantly coupled the various aryl bromides with different olefins in aqueous extract of the seeds of pericarps (pods) of theAcacia concinnaplant at 100 degrees C. [GRAPHICS] .</p>
1 aPatil, Seema, P.1 aJadhav, Sanjay, N.1 aRode, Chandrashekhar, V.1 aShejwal, Rajendra, V.1 aKumbhar, Arjun, S.  uhttp://library.ncl.res.in/content/bio-surfactant-green-and-environmentally-benign-reaction-medium-ligand-free-pd-catalyzed