TY - JOUR
T1 - Conjugate additions of lithium dialkynylcuprates [(RC≡C)2CuLi] to activated chromones. Unexpected formation of the 6H-bis[1]benzopyrano[2,3-b:3′,4′-e]pyridine system
AU - Daia, Dan E.
AU - Gabbutt, Christopher D.
AU - Heron, B. Mark
AU - Hepworth, John D.
AU - Hursthouse, Michael B.
AU - Malik, K. M.Abdul
PY - 2003/2/10
Y1 - 2003/2/10
N2 - Lithium dialkynylcuprates [(RC≡C)2CuLi], 1a-d, are easily generated and undergo conjugate additions to activated chromones giving 2-alkynylchroman-4-ones 4a-d, 13, 15c,d and 5, however, 1,4-additions to 3 proceed anomalously to give the eneynonitriles 6a-b and the bisbenzopyranopyridine 7.
AB - Lithium dialkynylcuprates [(RC≡C)2CuLi], 1a-d, are easily generated and undergo conjugate additions to activated chromones giving 2-alkynylchroman-4-ones 4a-d, 13, 15c,d and 5, however, 1,4-additions to 3 proceed anomalously to give the eneynonitriles 6a-b and the bisbenzopyranopyridine 7.
UR - http://www.scopus.com/inward/record.url?scp=0037429097&partnerID=8YFLogxK
U2 - 10.1016/S0040-4039(02)02857-5
DO - 10.1016/S0040-4039(02)02857-5
M3 - Article
AN - SCOPUS:0037429097
VL - 44
SP - 1461
EP - 1464
JO - Tetrahedron Letters
JF - Tetrahedron Letters
SN - 0040-4039
IS - 7
ER -