Rhodium(III)-Catalyzed Intramolecular Hydroarylation, Amidoarylation, and Heck-type Reaction: Three Distinct Pathways Determined by an Amide Directing Group
作者:Tyler A. Davis、Todd K. Hyster、Tomislav Rovis
DOI:10.1002/anie.201307631
日期:2013.12.23
reaction pathways of a wide variety of tethered alkenes can be accessed through changing the amide directing group. This provides an efficient route to a myriad of complex polycyclic products, many containing newly formed all‐carbonquaternary centers. Amidoarylations can diastereoselectively deliver products with up to three contiguous stereocenters.
Five DMAPP analogs with additional carbon atoms or with changed methylation patterns were converted with IPP and the bifunctional variediene synthase from Aspergillus brasiliensis AbVS to yield diterpene analogs with unusual skeletons. The DMAPP analogs opened new reaction pathways through the stabilisation of cationic charges at alternative carbon atoms that are naturally not observed.
Terminal Alkynes as One‐Carbon Donors in [5+1] Heteroannulation: Synthesis of Pyridines via Ynimine Intermediates and Application in the Total Synthesis of Anibamine B
作者:Rémi Lavernhe、Qian Wang、Jieping Zhu
DOI:10.1002/anie.202303537
日期:——
accessible β,γ-unsaturated oxime esters and terminal alkynes with complete regiochemical control and excellent functional-group compatibility. The first totalsynthesis of the indolizinium alkaloid anibamine B was accomplished featuring this novel pyridine synthesis as a key step.
二到五取代的吡啶是在一次操作中从易于获得的 β,γ-不饱和肟酯和末端炔烃合成的,具有完全的区域化学控制和优异的官能团相容性。以这种新型吡啶合成为关键步骤,完成了吲哚嗪生物碱 anibamine B 的首次全合成。
KAMETANI T.; HONDA T.; HUANG S.-P.; FUKUMOTO K., CAN. J. CHEM. <CJCH-AG>, 1975, 53, NO 24, 3820-3823
作者:KAMETANI T.、 HONDA T.、 HUANG S.-P.、 FUKUMOTO K.
DOI:——
日期:——
HAYNES, RICHARD K.;KATSIFIS, ANDREW G.;VONVILLER, SIMONE C.;HAMBLEY, TREV+, J. AMER. CHEM. SOC., 110,(1988) N 16, C. 5423-5433
作者:HAYNES, RICHARD K.、KATSIFIS, ANDREW G.、VONVILLER, SIMONE C.、HAMBLEY, TREV+