Project supported by the National Natural Science Foundation of China (Nos, 29525205, 30271488, 20021001 and 203900501 ).
The fully substituted cyclopentenedione core of madindoline A (1) and B (2) as potent and selective inhibitor of IL-6 has been synthesized efficiently. The quaternary carbon center C-2' was constructed on the bas...
Project supported by the National Natural Science Foundation of China (Nos. 29925205, 30271488, 20021001 and 203900501).
The easily prepared and recoverable chiral N-sulfonylated fl-amino alcohol 2 in combination with Ti(OPr-i)4 was found to be an effective chiral catalyst for the enantioselective addition of alkynylzinc to ketones, w...
the financial support of the NNSFC(No.30271488,20021001,and 203900501).
A convergent strategy to the key allylic silyl ether precursor 4 in our synthetic efforts toward morphinan alkaloid is presented. The vital step is the selective 1,2-addition of the organocerium agent of 6 to ketene 5.