Facile α-deprotonation–electrophilic substitution of quinuclidine and DABCO
作者:Satinder V. Kessar、Paramjit Singh、Kamal N. Singh、Sandeep K. Singh
DOI:10.1039/a905359j
日期:——
Deprotonation of BF3 complexes of quinuclidine or DABCO by Schlosser base and subsequent reaction with electrophiles affords α-substituted products in moderate to good yields.
Intramolecular Schmidt reactions of azides with carbocations: synthesis of bridged-bicyclic and fused-bicyclic tertiary amines
作者:William H. Pearson、Rajesh Walavalkar、Jeffrey M. Schkeryantz、Wen Kui Fang、James D. Blickensdorf
DOI:10.1021/ja00075a038
日期:1993.11
Aliphatic azides were captured intramolecularlyby carbocations, producing aminodiazonium ionintermediates. Carbon-to-nitrogen rearrangement then occurred, generating bridged- or fused-bicyclic a-amino carbocations or iminium ions, depending on the geometry about the C(+)-N bond. In the bridged systems, rapid elimination of the α-amino carbocations produced twisted enamines with 1-azabicyclo[3.2.2]nonene
(EN) The present invention relates to new crystalline zeolite SSZ-42 prepared by processes for preparing crystalline molecular sieves, particularly large pore zeolites, using an organic templating agent selected from the group consisting of N-benzyl-1,4-diazabicyclo[2.2.2]octane cations and N-benzyl-1-azabicyclo[2.2.2]octane cations.(FR) La présente invention se rapporte à une nouvelle zéolite cristalline SSZ-42 obtenue par des procédés de préparation de tamis moléculaires cristallins, notamment des zéolites à pores larges, à l'aide d'un agent modèle organique séléctionné dans le groupe constitué de cations N-benzyle-1,4-diazabicyclo[2.2.2]octane et de cations N-benzyle-1-azabicyclo[2.2.2]octane.