| Autor: |
Iizuka, Kosuke, Maegawa, Yoshifumi, Shimoyama, Yoshihiro, Sakamoto, Kei, Kayakiri, Natsuko, Goto, Yasutomo, Naganawa, Yuki, Tanaka, Shinji, Yoshida, Masaru, Inagaki, Shinji, Nakajima, Yumiko |
| Předmět: |
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| Zdroj: |
Chemistry - A European Journal; 2/7/2024, Vol. 30 Issue 8, p1-7, 7p |
| Abstrakt: |
Phosphine periodic mesoporous organosilicas (R‐P‐PMO‐TMS: R=Ph, tBu), which possess electron‐donating alkyl substituents on the phosphorus atom, were synthesized using bifunctional compounds with alkoxysilyl‐ and phosphino groups, bis[3‐(triethoxysilyl)propyl]phenylphosphine borane (1 a) and bis[3‐(triethoxysilyl)propyl]‐tert‐butylphosphine borane (1 b). Immobilization of Pd(0) species was performed to give R‐P‐Pd‐PMO‐TMS: R=Ph (2 a), tBu (3 a), respectively. The Pd(0) immobilized 2 a and 3 a were applicable as catalysts for Suzuki‐Miyaura cross‐coupling reactions of aryl chlorides with phenylboronic acid. It was revealed that 3 a bearing more electron‐donating tBu groups exhibited higher catalytic activity. Various functional groups including both electron withdrawing and donating substituents were compatible in the system. The recyclability of 3 a was examined to support its moderate utility for the recycle use. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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