A microwave-enhanced, solventless Mannich condensation of terminal alkynes and secondary amines with para-formaldehyde on cuprous iodide doped alumina
摘要:
A microwave-enhanced, solventless Mannich condensation of terminal alkynes and secondary amines with para-formaidehyde on cuprous iodide doped alumina has been developed. beta-Aminoalkynes are generated in good yields. The reaction can be extended to include a cyclization, which affords 2-substituted benzo[b]furans. The chemoselectivity of the reaction indicates that terminal alkynes are much more reactive than enolizable ketones under the reaction conditions. (c) 2005 Elsevier Ltd. All rights reserved.
A microwave-enhanced, solventless Mannich condensation of terminal alkynes and secondary amines with para-formaldehyde on cuprous iodide doped alumina
摘要:
A microwave-enhanced, solventless Mannich condensation of terminal alkynes and secondary amines with para-formaidehyde on cuprous iodide doped alumina has been developed. beta-Aminoalkynes are generated in good yields. The reaction can be extended to include a cyclization, which affords 2-substituted benzo[b]furans. The chemoselectivity of the reaction indicates that terminal alkynes are much more reactive than enolizable ketones under the reaction conditions. (c) 2005 Elsevier Ltd. All rights reserved.
Oxidation of Hydroxyl-Substituted Organotrifluoroborates
作者:Gary A. Molander、Daniel E. Petrillo
DOI:10.1021/ja062974i
日期:2006.8.1
Potassium- and tetra-n-butylammonium organotrifluoroborates containing hydroxyl groups have been prepared and oxidized using several common oxidants. Aryl-, alkenyl-, and alkyltrifluoroborates containing both primary and secondary hydroxyl groups were oxidized in moderate to excellent yields with complete retention of the trifluoroborate moiety. The utility of these oxidized products was demonstrated in a Suzuki-Miyaura cross-coupling reaction.
BIERER, DONALD E.;KABALKA, GEORGE W., ORG. PREP. AND PROCED. INT., 20,(1988) N 1-2, 63-72
作者:BIERER, DONALD E.、KABALKA, GEORGE W.
DOI:——
日期:——
A microwave-enhanced, solventless Mannich condensation of terminal alkynes and secondary amines with para-formaldehyde on cuprous iodide doped alumina
作者:George W. Kabalka、Li-Li Zhou、Lei Wang、Richard M. Pagni
DOI:10.1016/j.tet.2005.10.049
日期:2006.1
A microwave-enhanced, solventless Mannich condensation of terminal alkynes and secondary amines with para-formaidehyde on cuprous iodide doped alumina has been developed. beta-Aminoalkynes are generated in good yields. The reaction can be extended to include a cyclization, which affords 2-substituted benzo[b]furans. The chemoselectivity of the reaction indicates that terminal alkynes are much more reactive than enolizable ketones under the reaction conditions. (c) 2005 Elsevier Ltd. All rights reserved.