Transition Metal Catalyzed Methods for Preparing Nitroalkanes and Alkyl Amines

过渡金属催化制备硝基烷烃和烷基胺的方法

• 批准号: 8630455
• 负责人: Donald Allen Watson
• 金额: $ 28.72万
• 依托单位: UNIVERSITY OF DELAWARE
• 依托单位国家: 美国
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-02-01 至 2019-01-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8630455
• 关键词: Alkylation; Amination; Amines; Area; Biology; Carbon; Catalysis; Chemicals; Complex; Copper; Dependence; Development Plans; Elements; Goals; Hydrogenation; Imines; Improve Access; Indium; Investigation; Knowledge; Laboratories; Ligands; Light; Medicine; Methodology; Methods; Modern Medicine; Nature; Nitro Compounds; Nitrogen; Organic Synthesis; Pharmacologic Substance; Preparation; Process; Protocols documentation; Reaction; Reagent; Research; Route; Ruthenium; Seminal; Solutions; Structure; Techniques; Transition Elements; Variant; base; carbonyl compound; catalyst; chemical synthesis; human disease; improved; next generation; nitroalkane; novel; novel strategies; programs; public health relevance; success

Modern medicine is reliant on the preparation of complex organic molecules. These compounds comprise the active ingredients of most pharmaceutical agents. As the need for more selective, more potent, and more effective medicines increases, there is an ever-growing need to develop new methods for efficient chemical synthesis of complex organic molecules. Alkyl amines are a common structural element in many major pharmaceutical agents. Although numerous methods exist for their construction, many of these methods rely on common chemical intermediates (carbonyl compounds) as starting materials. This common chemical feedstock limits the ways in which alkyl amines can be prepared. Thus, there is need for new methods to prepare such molecules from other precursors. This proposal outlines two new methods to prepare complex alkyl amines using non-carbonyl starting materials. The thematic linkage of the proposed methods is the utilization of transition metal-based catalysts to develop new approaches to amine synthesis using nitroalkane starting materials. In Aim 1, a new approach to the carbon-centered alkylation of nitroalkanes using simple copper catalysts is proposed. The products from these reactions are readily converted into alkyl amines. Previous methods to achieve this transformation relied on experimentally demanding reaction conditions or on the use of either complex or highly toxic reagents. Based on our preliminary discovery of mild reaction conditions for the C-alkylation of nitroalkanes using abundant alkyl halides, a general method to prepare complex nitroalkanes is proposed. Aim 2 outlines plans for the development of a method for the catalytic conversion of nitroalkanes into enantioenriched amines using ruthenium catalysis. This new method promises to provide a new route into enantioenriched amines that is highly complementary to existing methods and can be broadly leveraged against the products from Aim 1, as well as nitroalkanes prepared by existing methods. In total, the proposed methodology is expected to provide improved access to complex alkyl amines using non-traditional starting materials. This effort will directly benefit the preparation of complex nitrogen-bearing organic molecules and aid in the discovery of the next generation of pharmaceutical agents.

现代医学依赖于复杂有机分子的制备。这些化合物包括