When more than one diastereomer is formed in an organic process than any other, this is known as diastereoselectivity. Cis/trans descriptors lose their validity when the only bond connecting the two centres is free to spin. Depending on the particular metal, the following changes in the diastereoselectivity of the enantioselective addition of various allylic organometallic reagents to carbonyl compounds, catalysed by either chiral Lewis acids or bases, or chelating ligands:
Independent of the initial allylic geometry,
(a) Si, Sn, and B allylic reagents mostly produce syn diastereoselectivity;
(b) Regardless of the initial allylic geometry, allylic reagents including Cr, Zn, and In produce mostly anti diastereoselectivity;
(c) The E/Z ratio of the beginning allylic geometry is reflected in the syn/anti diastereoselectivity of allylic trichlorosilanes (SiCl3).
Title : A desirable framework for establishing a resource circulation society
Dai Yeun Jeong, Jeju National University, Korea, Republic of
Title : The multidimensional topological shift of the KRASG12D proteins in catalytic environments and pertinent drugs-targetting
Orchidea Maria Lecian, Sapienza University of Rome, Italy
Title : Techno-economic and environmental analysis of Sustainable Aviation Fuel (SAF)
Mehdi Parivazh, Monash University, Australia
Title : Personalized and Precision Medicine (PPM) as a Unique Healthcare Model through Bi-odesign-Inspired Bio- and Chemical Engineering Applications to Secure the Human Healthcare and Biosafety: Engineering of Biocatalysts - from Evolution to Creation
Sergey Suchkov, R&D Director of the National Center for Human Photosynthesis, Mexico
Title : Sonophotocatalysis in advanced oxidation process: A short review
Collin G Joseph, University Malaysia Sabah, Malaysia
Title : Enhanced photocatalytic activities of NaLi1.07Co2.94(MoO4)5 nanoparticles under solar light
Rawia Nasri, University of Tunis El Manar, Tunisia