There are disclosed compounds having the formula ##STR1## wherein R and R' are selected from the group consisting of (a) substituents having the formula R.sup.1 R.sup.2 R.sup.3 C-wherein R.sup.1 is H or an alkyl group of 1 to 6 carbon atoms, and R.sup.2 and R.sup.3 are independently alkyl of 1 to 6 carbon atoms; (b) phenyl group; (c) phenyl group substituted by Br, Cl, F, alkyl group of 1 to 10 carbon atoms, or alkoxy group of 1 to 10 carbon atoms; and (d) an adamantyl group; and M is As or Sb; with the proviso that when R and R' are phenyl or substituted phenyl in which the substituents are in meta or para positions, M is As. Preferably R and R' are the same and are t-butyl, phenyl or adamantyl. The compounds display thermochromic properties.
The synthesis, structure, and chemistry of 10-Pn-3 systems: tricoordinate hypervalent pnicogen compounds
作者:Anthony J. Arduengo、Constantine A. Stewart、Fredric Davidson、David A. Dixon、James Y. Becker、Scott Anthony Culley、Mark B. Mizen
DOI:10.1021/ja00237a001
日期:1987.2
Formal synthesis of salinosporamide A via NHC-catalyzed intramolecular lactonization
作者:Justin R. Struble、Jeffrey W. Bode
DOI:10.1016/j.tet.2009.03.103
日期:2009.6
carbene (NHC) catalyzed intramolecular lactonization to prepare densely functionalized bicyclic γ-lactam-γ-lactone adducts from enals is reported. This method has been applied to the formal synthesis of salinosporamide A, a potent 20S proteasome inhibitor and anti-cancer therapeutic.
报道了N-杂环卡宾 (NHC) 催化分子内内酯化以从 enals 制备密集功能化的双环 γ-内酰胺-γ-内酯加合物。该方法已应用于盐孢菌素 A 的正式合成,这是一种有效的 20S 蛋白酶体抑制剂和抗癌治疗剂。