Debenzylation of tertiary amines using phosgene or triphosgene: an efficient and rapid procedure for the preparation of carbamoyl chlorides and unsymmetrical ureas. …
L Lemoucheux, J Rouden, M Ibazizene…
Index: Hoshino, Osamu; Saito, Keiji; Ishizaki, Miyuki; Umezawa, Bunsuke Synthetic Communications, 1987 , vol. 17, # 16 p. 1887 - 1892
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Citation Number: 69
Abstract
... Volume: Page ... 14 remains the precursor of choice for rapid and efficient radiosyntheses of symmetrical 15 or cyclic 11 C-ureas 16 and 11 ... 17 [ 11 C]Phosgene was used to prepare 11 C-labeled ethylchloroformate in low yields, 18 [ 11 C]methanol being preferred ...
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