Center-to-propeller and propeller-to-propeller stereocontrol in a series of macrobicyclic tri-λ5-phosphazenes
摘要:
Center-to-propeller stereocontrol in a family of macrobicyclic, double-propeller shaped tri-lambda(5)-triphosphazenes remains constant in the upper tribenzylamine fragment as the size of the pivotal group at the lower tris(phosphane) fragment is gradually increased. In contrast the propeller-to-propeller stereocontrol diminishes as a result of the increasing conformational lability in the lower hemisphere. (C) 2007 Elsevier Ltd. All rights reserved.
[reaction: see text] A straightforward and highly efficient synthesis of aromatic azides from the corresponding amines is accomplished using triflyl azide under mild conditions.
[反应:见正文]使用三氟叠氮化物在温和的条件下,可以从相应的胺中直接高效地合成芳族叠氮化物。
Center-to-propeller and propeller-to-propeller stereocontrol in a series of macrobicyclic tri-λ5-phosphazenes
Center-to-propeller stereocontrol in a family of macrobicyclic, double-propeller shaped tri-lambda(5)-triphosphazenes remains constant in the upper tribenzylamine fragment as the size of the pivotal group at the lower tris(phosphane) fragment is gradually increased. In contrast the propeller-to-propeller stereocontrol diminishes as a result of the increasing conformational lability in the lower hemisphere. (C) 2007 Elsevier Ltd. All rights reserved.