Cyclization Reactions of β,γ-Unsaturated Derivatives of Carbonic Acid. IX. Regiochemistry of Electrophilic Cyclofunctionalization of β,γ-Unsaturated Carbamic Acid Esters with Bromine - Synthesis of Oxazolidine-2-ones and Tetrahydro-2H-1,3-oxazine-2-ones
N,N-Disubstituted β,γ-unsaturated urethanes (1) and bromine react in methylene chloride at room temperature.The crotyl urethanes (1a-1c and 1e) and bromine give mixtures of corresponding saturated urethanes (dibromine adducts) (2a-2c and 2e), the oxazolid
Muehlstaedt, M.,Olk, B.,Widera, R.
p. 163 - 172
(2007/10/02)
CYCLOFUNKTIONALISIERUNG VON N-CYCLOHEXENYL- bzw. N-CINNAMYLURETHANEN zu OXAZOLIDIN-2-ONEN bzw. 1,3-OXAZIN-2-ONDERIVATEN
The cyclofunctionalization of N-3-cyclohexenyl urethanes and - thiourethanes and a new synthesis of N-substituted tetrahydro-2H-1,3-oxazine-2-ones are described.
Muehlstaedt, M.,Olk, B.,Widera, R.
p. 3979 - 3980
(2007/10/02)
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