منابع مشابه
Von Braun (BrCN) Reaction on Solasodine
von Braun Cyanogen Bromide Reaction, Solasodine, 13C NMR Solasodine on reaction with BrCN yielded two isomeric cyanamides in a ratio of 3:1, which have been characterised as C-22 configurational isomers, N-cyanosolasodine (22 R, 25 R) I IA and N-cyanosolasodine (22 S, 25 Rj II B on the basis of HI and *3C NMR studies. The same reaction with piperidine, yielded its cyanamide, the 13C NMR of whic...
متن کاملSome Extensions of von Braun (BrCN) Reaction on Organic Bases
von Braun Cyanogen Bromide Reaction Some extensions of von Braun cyanogen bromide reaction have been undertaken on conessine, isoconessine and two simpler bases, dimethyl a-naphthyl amine and diethyl amine. The monocyanamides of conessine and isoconessine yielded acid amides, aminoderivatives (diamines) and guanido derivatives on careful hydrolysis, reduction and treatment with ammonia, respect...
متن کاملSome Extensions of von Braun (BrCN) Reaction on Organic Bases: Part II
In an earlier communication Siddiqui and Bina [1] reported some extensions of von Braun BrCN reaction on the conessine series of alkaloids, which appeared to provide a novel route for the synthesis of therapeutically active nitrogenous compounds including substituted ureas, diamines, carbinol amines and guanidine derivatives. However, it was noted by them that dimethyl a-napthylamine and diethy...
متن کاملSabine Braun and Judith
s/23_abstract_Videoconferencing_Norway.pdf; http://www.ccbe.org/fileadmin/user_upload/document/E-Justice_Portal/17-18_02_2009/ Presentations/23_Videoconferencing_in_Norwegian_courts.pdf 34 http://www.haaretz.co.il/hasite/spages/808333.html 35 http://www.lantech.co.ke/index.php?option=com_content&view=article&id=57&Itemid=74 36 http://www.supremecourt.tas.gov.au/about_us/courtroom_technology/ vi...
متن کاملAIAA 2001–0175 Alternate History and the Evolution of Manned Flight
Several turning points in aerospace history are examined to explore possible alternative outcomes and important aspects of the historical significance of the divergences and the impact upon aerospace technology. In early aviation, the aviators Otto Lilien-thal, Samuel Langley, and the Wright Brothers are considered as likely candidates for alternative historical paths. In early rocket developme...
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ژورنال
عنوان ژورنال: Nature
سال: 1977
ISSN: 0028-0836,1476-4687
DOI: 10.1038/269633a0