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Facial selectivity in the 4 + 2 reactions of a diene derived from carvone
(Royal Society of Chemistry, 2006)
The facial selectivities of cyclohexadienes bearing isopropenyl and isopropyl groups as
plane-nonsymmetric substituents were assessed in 4 + 2 reactions with N-phenylmaleimide,
tetracyanoethylene and 4-phenyl-1,2,4- ...
Microwave-accelerated synthesis of benzyl 3,5-dimethyl-pyrrole-2-carboxylate
(2006-12)
Benzyl 3,5-dimethyl-pyrrole-2-carboxylate, a very useful pyrrole in porphyrin and dipyrromethene
synthesis, can be synthesized via the Knorr-type reaction, but in low yield. Alternative routes to
benzyl 3,5-dimethyl-pyrr ...
cis-3,5-Cyclohexadiene-1,2-diol derivatives: facial selectivity in their Diels-Alder reactions with ethylenic, acetylenic and azo dienophiles
(2006)
The Diels - Alder reactions of maleimide with the acetonide derivative (6a) of
cis-3,5-cyclohexadiene-1,2-diol (1a) in various solvents showed facial selectivities ranging from 1
: 1 to 1 : 9. The same derivative 6a reacted ...
Heteroleptic zinc dipyrromethene complexes
(2006-03)
H-1 NMR spectroscopy has been used to study the complexation of a per-alkyl dipyrromethene with
zinc acetate. An intermediate, assigned to be the heteroleptic Zn(dipyrromethene) (acetate) complex,
is observed under titration ...
Technique for determination of accurate heat capacities of volatile, powdered, or air-sensitive samples using relaxation calorimetry
(2006-09)
We introduce a four-step technique for the accurate determination of the heat capacity of
volatile or air-sensitive samples using relaxation calorimetry. The samples are encapsulated in a
hermetically sealed differential ...