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Acetoxylation of steroidal lactones by means of lead tetraacetate
(Elsevier, 1970)
One of the structural features of many bitter principles ls the presence of a &-lactone ring. Some of these compounds differ from one another by the state of oxidation of the molecule as a whole and also by the state of ...
Preparation and photolysis of 2-diazo-6-oximino- and 2,6-bisdiazo-4-tert. Butylcyclohexanone
(Elsevier, 1967)
Reaction mechanism of diazoketone photolysie is assumed
to involve the formation ofd-keto-carbene intermediates, final products being dependent on the molecular structure and
reaction medium. Numerous example8 of ...
Bromophilic substitution/carbophilic substitution cascade reactions of alpha,alpha-dibromo-2-methoxyacetophenone with C-, N- and O-nucleophiles
(Oxford : Pergamon-Elsevier Science Ltd, 2010)
alpha,alpha-Dibromo-2-methoxyacetophenone reacts, under mild reaction conditions, with C-, N- and O-nucleophiles via a bromophilic substitution/protonation/carbophilic substitution cascade process to afford alpha-monosub ...
A new type of sesqiterpene lactone isolated from artemisia annua L. arteannuin B
(Elsevier, 1973)
The structure of a new sesquiterpene lactone, arteannuin B, isolated from Artemisia annua L. is reported.
On the choice of optimal conformation in linear free-energy relationships. Reactivity of 2-[(carboxymethyl)sulfanyl]-4-oxo-4-arylbutanoic acids with diphenyldiazomethane
(Amsterdam : Elsevier, 2012)
Rate constants for the esterification of eleven 2-[(carboxymethyl)sulfanyl]-4-oxo-4-arylbutanoic acids
with diphenyldiazomethane in ethanol at 30 C were determined, and correlated with substituent constants
using classical ...
An improved preparation of 3-α-acetoxy-11,20-diketo-(5β)-pregnane, the key intermediate in the synthesis of 11-oxygenated corticosteroids
(Elsevier, 1967)
Although microbiological methods of introducing oxygen at C-11 of the steroid molecule are effective, it is obvious that purely synthetic way of producing cortisone and its analogs from bile acids or hecogenin have never ...
Selective borane reductions of progesterone
(Elsevier, 1967)
A number of selective reductions using borane end metal borohydrides has been described. In our studies of hydroboration of steroid conjugated ketones under different conditions and with different solvents we have found ...
Transannular solvolysis reactions in seco-steroids containing a ten-membered ring.
(Pergamon Press, 1970)
Homoallylic interaction in steroidal cyclodecenyl systems
(Pergamon Press, 1974)
Palladium-catalysed synthesis of allyl acetates from allenes
(Oxford : Pergamon-Elsevier Science Ltd, 2010)
Allyl acetates were synthesised from allenes utilising methodology based on the general reactivity of pi-allyl palladium intermediates which participate efficiently in transformations involving nucleophiles. Reactions of ...