Chemistry can be defined as the study of matter and the changes it undergoes. You¡¯ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology. 51805-45-9, Name is 3,3′,3”-Phosphinetriyltripropanoic acid hydrochloride, molecular formula is , belongs to chiral-phosphine-ligands compound. In a document, author is Xu, Meng-Yu, COA of Formula: C9H16ClO6P.
Alkyl Carbagermatranes Enable Practical Palladium-Catalyzed sp(2)-sp(3) Cross-Coupling
Pd-catalyzed cross-coupling reactions have achieved tremendous accomplishments in the past decades. However, C(sp(3))-hybridized nucleophiles generally remain as challenging coupling partners due to their sluggish transmetalation compared to the C(sp(2))-hybridized counterparts. While a single-electron-transfer-based strategy using C(sp(3))-hybridized nucleophiles had made significant progress recently, fewer breakthroughs have been made concerning the traditional two-electron mechanism involving C(sp(3))-hybridized nucleophiles. In this report, we present a series of unique alkyl carbagermatranes that were proven to be highly reactive in cross-coupling reactions with our newly developed electron-deficient phosphine ligands. Generally, secondary alkyl carbagermatranes show slightly lower, yet comparable activity to its Sn analogue. Meanwhile, primary alkyl carbagermatranes exhibit high activity, and they were also proved stable enough to be compatible with various reactions. Chiral secondary benzyl carbagermatrane gave the coupling product under base/additive-free conditions with its configuration fully inversed, suggesting that transmetalation was carried out in an S(E)2(open) Inv pathway, which is consistent with Hiyama’s previous observation. Notably, the cross-coupling of primary alkyl carbagermatranes could be performed under base/additive-free conditions with excellent functional group tolerance and therefore may have potentially important applications such as stapled peptide synthesis.
Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 51805-45-9, in my other articles. COA of Formula: C9H16ClO6P.
Reference:
Phosphine ligand,
,Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate