Phase II Environmentally greener, efficient, and safe synthetic platform for the

DESCRIPTION (provided by applicant): We propose to continue expanding the study of iridium-catalyzed aromatic C-H activation/borylation in concert with other chemical conversions as a new approach to currently inaccessible chemical building blocks that will be highly useful for variety of practical applications, including pharmaceutical, agro-chemical, materials and fine chemical development. The mildness of the Ir-catalysts and the reaction conditions under which they operate, allows for the borylation of arenes containing a variety of functional groups. Given this substrate tolerance, a wide range of subsequent same-pot reactions is possible, and currently under development. Our newly invented process that telescopes C-H activation/borylation with oxidations serves as a prime example of this ability to couple borylation with other chemical transformations in an efficient, scaleable way. This process provides rapid and unique access to new and highly functionalized phenolic building blocks that are currently commercially unavailable or accessible only by protracted, costly, and otherwise unattractive routes. Phenols are commercially important compounds that are extensively utilized, especially in the area of drug discovery, development, and manufacture. Even with an array of methods for their production, there are still many relatively simple examples where the established syntheses are prohibitively long and/or low yielding for practical use. In this proposal BoroPharm aims to combat these difficulties through the commercial development of proprietary technology that has been exclusively licensed to BoroPharm, Inc. Specifically, BoroPharm aims to validate iridium-catalyzed aromatic borylation/oxidation as a commercial route to pharmaceutically relevant phenols and hydroxypyridines. Based on the successful completion of Phase I objectives and industry feedback from BoroPharm's growing client base, the following specific aims will be addressed in this Phase II proposal: 1. Expand the portfolio of borylated pyridine derivatives and add quinolines, pyrazines, pyrimidines, diazenes, imidazoles, pyrazoles, oxazoles, etc. Produce oxidized products (e.g. hydroxyquinolines) where applicable. 2. Explore new boron technologies including the formation and utilization of trifluoroborate, triolate, and MIDA derivatives. 3. Augment the phenol portfolio to make more previously unreported products available. Increase the scale to produce kilogram quantities. 4. Expand upon additional transformations of aryl boronates in the portfolio, and to produce new products where the carbon-boron bonds are either transformed or retained. PUBLIC HEALTH RELEVANCE: The invention of new drugs rests heavily on the chemist's ability to assemble unique compounds from molecular building blocks. In this regard, new pharmaceuticals call for new building blocks, while lower cost drugs will require more efficient and environmentally friendly routes to these key intermediates. Herein we propose to develop the next phase of a novel technology for the creation of unique and versatile chemical building blocks, the invention of which will aid the discovery and development of new medicines. This project is a continuation of a phase I grant that succeeded with positive outcomes. Herein, we will expand upon the breadth, scope and scale of the chemical platform and expand on the synthesis of novel and useful pharmaceutical building blocks.