Reaktion #94859

Reaktionsgleichung

1-[3-(2-guanidinothiazol-4-yl)-cyclohexylamino]-2-methoxycyclobutene-3,4-dione

methanol chloroform

1,4-diaminobutane

→

1,4-bis{1-[3-(2-guanidinothiazol-4-yl)cyclohexylamino]-3,4-dioxocyclobutenylamino}butane

Lösungsmittel

methanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturThe solution was heated
2. 2
   Temperaturunder reflux for 16 hours during which time a precipitate
3. 3
   Sonstigeformed
4. 4
   TemperaturThe reaction mixture was cooled
5. 5
   Sonstigethe solid precipitate collected
6. 6
   Waschenwashed with methanol (1 ml.) and ether (2 ml.)

Vorschrift

To a solution of 1-[3-(2-guanidinothiazol-4-yl)-cyclohexylamino]-2-methoxycyclobutene-3,4-dione (0.35 g.) in 60 ml. of methanol/chloroform (50:50 v/v) was added 1,4-diaminobutane (0.044 g.) in methanol (1 ml.). The solution was heated under reflux for 16 hours during which time a precipitate formed. The reaction mixture was cooled and the solid precipitate collected and washed with methanol (1 ml.) and ether (2 ml.) to give, as an off-white powder, 1,4-bis{1-[3-(2-guanidinothiazol-4-yl)cyclohexylamino]-3,4-dioxocyclobutenylamino}butane. The carbon-13 magnetic resonance spectrum (δ relative to tetramethylsilane) in d6 -DMSO included one carbon singlets at 182.3, 174.8, 167.7, 167.0, 156.7, 155.3, 100.3 and 52.4 together with a series of singlets from 42.9 to 24.0 p.p.m. (the latter group of signals includes the resonances due to the solvent).

Quelle