01223nas a2200157   4500008004100000245009100041210006900132260000800201300001800209490000700227520064400234100002500878700002500903700001800928856011900946       2006                        eng d00aSynthesis and utility of new amine/nucleobase addition products of allenylphosphonates0 aSynthesis and utility of new aminenucleobase addition products o  cSEP  a10152–101610 v623 a<p>In the reaction of allenylphosphonates with amines/nucleobases, depending on the amine and the allenylphosphonate, either Z- or E-vinylphosphonate or allylphosphonate as a single isomer with a β-amino functionality was isolated. A simple route to phosphonates with a β-NH2 group is developed by direct reaction with ammonia. In reactions with adenine, three different modes of reaction, with one of them involving an unusual cyclisation, are observed. The utility of (enamino)allyl phosphonate products thus obtained in the synthesis of (enamino)-1,3-butadienes via Horner–Wadsworth–Emmons (HWE) reaction is also demonstrated.</p>1 aSwamy, K., C. Kumara1 aBalaraman, Ekambaram1 aKumar, Satish  uhttps://library.ncl.res.in/content/synthesis-and-utility-new-aminenucleobase-addition-products-allenylphosphonates