Gemischte organozinkverbindungen durch austauschreaktionen von diorganozinkverbindungen
作者:Hans Nehl、Walter R. Scheidt
DOI:10.1016/0022-328x(85)88021-9
日期:1985.7
The exchange of organyl groups between various diorganozinc compounds, R21Zn (R1 = CHMe2 (1), CH2(CH2)2Me (2), CH2C(Me)CH2 (3), CH2CHCHMe (4)) and R22Zn (R2 = Et (5), CH(Me)Et (6), CH2(CH2)3Me (7), CMe3 (8), Menthyl (9), Ph (10), Cyclohexyl (11)), has been followed by mass spectroscopy: molecular ions for the mixed compounds R1R2Zn were observed. The exchange equilibrium constants for 1–5 and 7–11
Regioselective C–H bond functionalizations of acridines using organozinc reagents
作者:Isao Hyodo、Mamoru Tobisu、Naoto Chatani
DOI:10.1039/c1cc16582h
日期:——
Despite the recent advance in CâH bond functionalization chemistry, the CâH bonds in the acridine ring system, which is an important scaffold in medicinal and material science, have met with limited success, due, in part, to the lack of activated CâH bonds adjacent to the ring nitrogen atom. Herein, several protocols that can effect the regioselective arylation and alkylation of acridines at the C-4 and C-9 positions are described.
Bis(alk-4-enyl)zink-verbindungen durch addition von alk-2-enylzink an olefine
作者:Herbert Lehmkuhl、Ingo Döring、Hans Nehl
DOI:10.1016/s0022-328x(00)89045-2
日期:1981.12
The dialk-2-enylzinc compounds I–IV add to ethylene, oct-1-ene and 3,3-dimethylcyclopropene to give the corresponding di-alk-4-enylzinc compounds VI–IX (88–98% yield), XV and XVI (90–94% yield), XVII (7%) and XXIIIa–XXVIa (91–98% yield). Additions to XIII are regioselective with Zn → C(1) while stereoselective cis-addition to XXII is observed.
Thermische stabilität von Bis(alk-2-enyl)zink-Verbindungen
作者:Herbert Lehmkuhl、Ingo Döring、Hans Nehl
DOI:10.1016/s0022-328x(00)81023-2
日期:1981.11
The dialk-2-enylzinc compounds I–III react slowly at 20 to 50°C by addition of the ZnC bond to the CC bond of an alk-2-enyl group to give oligomers from which the alkenes XIII–XV are released on hydrolysis. For I–III homolytic cleavage of the ZnCallyl bond, followed by coupling of the allyl radicals to give the alkadienes V–VII, IX and XI predominates above 50°C. IV decomposes mainly homolytically