- NITROGEN-CONTAINING HETEROCYCLIC COMPOUND OR SALT THEREOF
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A compound represented by Formula [1] (in the formula, Z1 represents N, CH, or the like; X1 represents NH or the like; R1 represents a heteroaryl group or the like; each of R2, R3, and R4 represents a hydrogen atom, a halogen atom, an alkoxy group, or the like; and R5 represents a heteroaryl group or the like) or salt thereof.
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- Investigation of the scope and regiochemistry of alkynylboronate cycloadditions with sydnones
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The cycloaddition of alkynylboronates and sydnones provides a convenientand highly regioselective method for the synthesis of a broad range of di-, tri-, and tetrasubstituted pyrazole boronic esters. The origins of an observed regiochemical divergence in the reactions of terminal alkyny lboronates with their more substituted analogues have been studied by DFT methods.
- Browne, Duncan L.,Vivat, Jerome F.,Plant, Andrew,Gomez-Bengoa, Enrique,Harrity, Joseph P. A.
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p. 7762 - 7769
(2009/10/16)
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- A sydnone cycloaddition route to pyrazole boronic esters
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(Chemical Equation Presented) From dipole to diazole! A direct and regioselective route to functionalized pyrazole boronic esters is developed that employs the cycloaddition of alkynylboronates with sydnones. Functionalization of these products by Suzuki coupling and N-deprotection processes highlight the potential synthetic utility of these species.
- Browne, Duncan L.,Helm, Matthew D.,Plant, Andrew,Harrity, Joseph P. A.
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p. 8656 - 8658
(2008/09/18)
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