| abstract |
Industrial and commercial processes for the preparation of 2-acyl-5-benzylfuran derivatives, 1,2,4-triazole-3-carboxylic acid ester derivatives or propenone derivatives having an anti-HIV activity; and useful crystals of the derivatives. A deblocking: (III-2), (IV-10), (VI-1), wherein R<1>, R<2 >and R<4 >are each independently hydrogen or the like; A is CR<6 >or N; R<6 >is hydrogen or the like; Q is a protecting group; and L is a leaving group. |