of(VI)酯络合物[{OsO 2(O 2 R)(NC 7 H 13)} 2 ]是通过单烯烃R(R =环己烯,乙烯或二苯乙烯)与加合物OsO 4 ·NC 7 H反应形成的13(NC 7 H 13 =喹核苷)含有不对称的Os 2 O 2桥;在溶液中,它们具有五坐标单体结构。与叔胺L(L =吡啶,甲基咪唑,5,6-二甲基苯并咪唑或奎尼啶)一起,它们会给出相应的反式-二氧杂合物[OsO 2(O 2R)(NC 7 H 13)L]。加合物OsO 4 ·NC 7 H 13与二烯R(R =环己-1,3-二烯,环八-1,5-二烯或2,5-二甲基六-2,4-二烯)反应生成产物[{Os 2 O 4(O 4 R)(NC 7 H 13)2 } n ]或[{OsO 2(O 2 R)(NC 7 H 13)} 2 ]。使用炔烃R可以得到[{Os 2 O 4(O 4 R)(NC 7 H 13)2} n ]· n S(R =
Studies of transition-metal oxo- and nitrido-complexes. Part 5. Oxo-osmium ester complexes with quinuclidine and related amines
作者:Martin Schröder、Alastair J. Nielson、William P. Griffith
DOI:10.1039/dt9790001607
日期:——
trans-dioxo-complexes [OsO2(O2R)(NC7H13)L]. The adduct OsO4·NC7H13 reacts with dienes R (R = cyclohexa-1,3-diene, cyclo-octa-1,5-diene, or 2,5-dimethylhexa-2,4-diene) to give products [Os2O4(O4R)(NC7H13)2}n] or [OsO2(O2R)(NC7H13)}2]. With alkynes R they give [Os2O4(O4R)(NC7H13)2}n]·nS (R = C2H2, S = benzene, toluene, or carbon tetrachloride) and [Os2O4(O4R)(NC7H13)2}n](R = PhC2H); these products
of(VI)酯络合物[OsO 2(O 2 R)(NC 7 H 13)} 2 ]是通过单烯烃R(R =环己烯,乙烯或二苯乙烯)与加合物OsO 4 ·NC 7 H反应形成的13(NC 7 H 13 =喹核苷)含有不对称的Os 2 O 2桥;在溶液中,它们具有五坐标单体结构。与叔胺L(L =吡啶,甲基咪唑,5,6-二甲基苯并咪唑或奎尼啶)一起,它们会给出相应的反式-二氧杂合物[OsO 2(O 2R)(NC 7 H 13)L]。加合物OsO 4 ·NC 7 H 13与二烯R(R =环己-1,3-二烯,环八-1,5-二烯或2,5-二甲基六-2,4-二烯)反应生成产物[Os 2 O 4(O 4 R)(NC 7 H 13)2 } n ]或[OsO 2(O 2 R)(NC 7 H 13)} 2 ]。使用炔烃R可以得到[Os 2 O 4(O 4 R)(NC 7 H 13)2} n ]· n S(R =
A bridged backbone strategy enables collective synthesis of strychnan alkaloids
biological significance, being ubiquitous in pharmaceutical molecules and natural products. Specific structures are usually preformed to build these rigid segments at the middle or late stage in the synthesis of polycyclic molecules, resulting in decreased synthetic efficiency and target-specific syntheses. As a logically distinct synthetic strategy, we constructed an allene/ketone-equipped morphan core