Helical organosilica materials were synthesized for the first time using a novel binaphthyl-based chiral co-monomer in less than 1 hour. The incorporation of a chiral co-monomer in the wall was shown to influence the curvature of the helical materials. As the amount of the chiral co-monomer was increased, the degree of curvature increased, illustrating the importance of this monomer to the overall morphology.
The linked directed ortho and remote metalation
(DoM and DreM) and cross-coupling
reactions of aryl phosphorodiamidates (Ar-OP(O)(NEt2)2) is reported. The o-iodo and o-boronato aryl tetraethylphosphorodiamidates 3, prepared by DoM, undergo orthogonal Ni-
and Pd-catalyzed Suzuki–Miyaura cross coupling to furnish biaryls 4 and 5 in good to excellent yields. Silicon
group protection of biaryl 4 via DoM
followed by previously unobserved DreM phospha anionic
Fries rearrangement affords biaryls 11 which, under acidic
conditions, furnish oxaphosphorine oxides 12.
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