Maiden voyage: New arsenic‐, antimony‐ and bismuth‐donor reagents (1 b–d) are used in a one‐pot synthesis of cyclicarsanes, stibanes and bismutanes through a procedure in which the simultaneous formation of three CAs, CSb or CBi bonds is achieved. At the end of the reaction, the element‐donor reagent can be easily re‐formed “in situ” and recycled, as in a catalytic process.
处女航次:一种新的砷,锑和铋供体试剂(1 b – d)通过一种同时合成三个C rs As,C的方法,用于一锅合成环状a烷,二苯乙烯和双变烷获得Sb或CBi键。在反应结束时,可以像在催化过程中一样轻松地“原位”重组元素供体试剂并回收利用。
A Fast Catalytic Process of Transfer of a Phosphorus Atom: How Folding of the Reagent is Related to its Catalytic Activity. A Possible Correlation with Rna Behavior
作者:Graziano Baccolini、Gabriele Micheletti
DOI:10.1080/10426507.2014.883625
日期:2014.8.3
different Grignardreagents giving, in a very fast and in a highly selective manner, only one phosphorus-containing compound with an enormous rate enhancement with respect to the corresponding no-catalyzed reaction which gives a final cluttered mixture of many organophosphorus products. The focal factor to explain this highly selective process of P transport lies in the folded structure of the reagent with
摘要 描述了一种简单且非常快速的磷原子转移过程,该过程由作为催化剂的简单分子在几乎无限的催化循环中进行。该催化剂将一个 P 原子提供给两种不同格氏试剂的混合物,以非常快速和高度选择性的方式,仅产生一种含磷化合物,相对于相应的无催化反应,具有极大的速率提高,从而产生许多有机磷产品的最终杂乱混合物。解释这种高选择性 P 传输过程的焦点因素在于试剂的折叠结构,围绕磷原子具有特定角度,这可以促进环状三方双锥五配位物质的形成,进而促进其催化活性。以类似的方式,RNA 可以采用,在一个精确的位置,一个特定的三维结构,可能有助于形成导致催化功能的五配位物种。图形概要
Steinkopf; Schubart; Roch, Chemische Berichte, 1932, vol. 65, p. 412