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A facile hydroiodination of alkynes using readily-available reagents such as I 2 , PPh 3 , and H 2 O has been developed. This is extended to the one-pot synthesis of trisubstituted alkenes from alkynes via iodoalkenes using Pd-catalyzed cross-coupling and related methods such as the Suzuki–Miyaura cross-coupling, Sonogashira cross-coupling reaction, and Mizoroki–Heck reaction.
Markovnikov-type hydroiodination of terminal alkynes with iodine and Ph 2 P(O)H took place selectively to afford the corresponding internal iodoalkenes in good yields. Combination of (PhO) 2 P(O)H and Ph 2 P(O)OH instead of Ph 2 P(O)H also provided internal iodoalkenes in excellent yields. This hydroiodination is advantageous in terms of mild conditions, convenient...
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