Divergent Synthesis of Tunable Cyclopentadienyl Ligands and Their Application in Rh-Catalyzed Enantioselective Synthesis of Isoindolinone
作者:Wen-Jun Cui、Zhi-Jie Wu、Qing Gu、Shu-Li You
DOI:10.1021/jacs.0c02813
日期:2020.4.22
unprecedented enantioselective [4+1] annulation reaction of benzamides and alkenes was achieved with a broad substrate scope under mild reaction conditions, providing a variety of isoindolinones with excellent regio- and enantioselectivity (up to 94% yield, 97:3 er). Preliminary mechanistic studies suggest that the reaction involves an oxidative Heck reaction and an intramolecular enantioselective alkene
Chemical Compositions and Methodology to Enhance Plant Growth and Development
申请人:McDaniel Robert Gene
公开号:US20150038330A1
公开(公告)日:2015-02-05
Plant seeds, seedlings, or developing plants are treated with aqueous, dry, or appropriately solvated chemical formulations composed of nucleotides or nucleosides buffered with an effective amount of non-toxic biologically compatible agents, simultaneously with an antioxidant and lipoxygenase enzyme inhibitor. The purpose is to improve or optimize seed germination rate, seedling vigor, and ultimately plant growth characteristics and yield performance. In the preferred embodiment, seeds or other plant tissues are treated with adenosine monophosphate buffered with an excess amount of phosphoric acid salts at about pH 7.0 as described in U.S. Pat. No. 4,209,316. The improvement described in this application comprises the simultaneous addition of a similar quantity of propyl gallate to the adenosine monophosphate maintaining pH around 7.0 or below. Addition of a lesser, fractional quantity of a magnesium salt, such as magnesium sulfate, is to be included in the formulation to potentiate the action of the chemical treatment if planting soil or medium is shown to be magnesium deficient.