Iodine(V) Reagents in Organic Synthesis. Part 3. New Routes to Heterocyclic Compounds via <i>o</i>-Iodoxybenzoic Acid-Mediated Cyclizations: Generality, Scope, and Mechanism
作者:K. C. Nicolaou、P. S. Baran、Y.-L. Zhong、S. Barluenga、K. W. Hunt、R. Kranich、J. A. Vega
DOI:10.1021/ja012126h
日期:2002.3.1
The discovery and development of the o-iodoxybenzoic acid (IBX) reaction with certain unsaturated N-aryl amides (anilides) to form heterocycles are described. The application of the method to the synthesis of delta-lactams, cyclic urethanes, hydroxy amines, and amino sugars among other important building blocks and intermediates is detailed. In addition to the generality and scope of this cyclization
The unusual behavior of hypervalent iodine reagents, Dess - Martin periodinane and IBX, with an array of anilides leads to the formation of complex heterocycles in only one synthetic operation (see scheme). Furthermore, the substrates for these transformations are available in one step from readily available commercial building blocks. The mechanism by which these periodinanes interact with anilides
Iodine(V) Reagents in Organic Synthesis. Part 1. Synthesis of Polycyclic Heterocycles via Dess−Martin Periodinane-Mediated Cascade Cyclization: Generality, Scope, and Mechanism of the Reaction
作者:K. C. Nicolaou、P. S. Baran、Y.-L. Zhong、K. Sugita
DOI:10.1021/ja012124x
日期:2002.3.1
reaction of unsaturated anilides discovered during the total synthesis of the CP-molecules (phomoidrides A and B) are delineated. A plethora of heterocyclic compounds are accessible by employing gamma,delta-unsaturated amides (derived fromanilines and carboxylic acids), urethanes, or ureas (derived from isocyanates and allylic alcohols and amines) as substrates. Optimization of the reaction led to room-temperature
描述了在 CP 分子(phomoidrides A 和 B)的全合成过程中发现的不饱和苯胺的 Dess-Martin periodinane 介导的环化反应的范围、一般性和机制。通过使用γ,δ-不饱和酰胺(衍生自苯胺和羧酸)、氨基甲酸酯或脲(衍生自异氰酸酯和烯丙醇和胺)作为底物,可以获得大量杂环化合物。反应的优化导致室温条件,而同位素标记研究为这种级联反应提供了机械原理。
New Synthetic Technology for the Rapid Construction of Novel Heterocycles—Part 1: The Reaction of Dess - Martin Periodinane with Anilides and Related Compounds
commercial building blocks. The mechanism by which these periodinanes interact with anilides is also explored. This exciting new class of chemical reactions was discovered during the course of the total synthesis of the CP molecules and leads to compounds which are relevant to chemical biology investigations and pharmaceutical research.