作者:Jens Cordes、Philip R. D. Murray、Andrew J. P. White、Anthony G. M. Barrett
DOI:10.1021/ol402301g
日期:2013.10.4
A convenient and simple three step synthesis of 1,7-diazaspiro[5.5]undecane via Claisen condensation and acid catalyzed decarboxylation and spirocyclization of N-Boc-δ-valerolactam is described. Reactions of this spiroaminal with electrophiles including alkyl halides, alkane dihalides, acid chlorides, and sulfonyl chlorides gave either spirocyclic adducts or tetrahydropyridine derivatives. Additionally
描述了通过克莱森缩合和酸催化的N -Boc-δ-戊内酰胺螺环化和螺环化的一种简便的三步合成1,7-二氮杂螺[5.5]十一烷的方法。该螺氨基缩醛与亲电试剂的反应包括烷基卤,烷烃二卤化物,酰氯和磺酰氯,得到螺环加合物或四氢吡啶衍生物。此外,母体杂环是一种新型的二齿配体,并与钌(II)和铜(II)形成配合物。