A Simple Preparation of Cyclic Vinylic Bromides (1-Bromocycloalkenes and 1-Bromo-1,5-cyclooctadiene) from 1,2-Dibromocycloalkanes
作者:Balachandra S. Bandodakar、Gopalpur Nagendrappa
DOI:10.1055/s-1990-27031
日期:——
1,2-Dibromocyclopentane, 1,2-dibromocyclohexane, 1,2-dibromocycloheptane, 1,2-dibromocyclooctane, 1,2-dibromocyclododecane, and 5,6-dibromocyclooctene are smoothly dehydrobrominated to the corresponding 1-bromocycloalkenes in good yield using morpholine and dimethyl sulfoxide in benzene or ethanol.
1,5-Cyclooctadienyl alcohols and ketones generate a new class of COD Pt complexes
作者:Angela E. E. Wandler、Martin R. M. Koos、Martin Nieger、Burkhard Luy、Stefan Bräse
DOI:10.1039/c8dt00075a
日期:——
A variety of new racemic alcohol and ketone cyclooctadiene derivatives was prepared for their complexation with platinum to generate a newclass of platinum(II) complexes.
Expeditious Synthesis of Functionalized 1-Arylcyclooctadienes <i>via</i>
Palladium-Catalyzed Lithium Cross-Coupling
作者:Angela E. E. Wandler、Stefan Bräse
DOI:10.1002/adsc.201600887
日期:2016.12.22
The palladium‐catalyzeddirect cross‐coupling of aryl bromides and (1Z,5Z)‐cycloocta‐1,5‐dien‐1‐yllithium is described as an important method to synthesize 1‐arylcyclooctadienes. The use of a well‐established Pd2dba3/XPhos catalytic system affords the desired new compounds in good to excellent yields; the reaction proceeds at roomtemperature with both high efficiency and selectivity. Finally we found
The present disclosure provides a polymerizable compound of the formula (I)
where the R
1
, R
2
, R′
1
, R′
2
, X
1
to X
8
, Y
1
, Y
2
, M and L have any of values as defined in the specification. The disclosure also provides an oligomer, a homo-polymer, or a co-polymer of compound of the formula (I). The disclosure also provides methods for preparing the compound of the formula (I) and methods for preparing polymers of the compound of the formula (I), and to methods and intermediates useful for preparing them. The disclosure also provides methods for the use of the polymers of formula (I) as chiral catalysts in enantioselective preparative processes.