106357-28-2Relevant academic research and scientific papers
Improved Synthesis of the C8-C23 Segment of Aplysiatoxins via Asymmetric Dihydroxylation of the Chiral Homoallylic Alcohol
Toshima, Hiroaki,Ichihara, Akitami
, p. 599 - 602 (2007/10/03)
Important intermediate 2 of the segment (3) possessing four sequential asymmetric centers (C9-C12) of aplysiatoxins was synthesized via dihydroxylation of 5 in only 7 steps from methyl (S)-3-hydroxy-2-methylpropionate.Another promising compound (10a) was
Acyclic diastereoselective synthesis using tartrate ester modified crotylboronates. Double asymmetric reactions with α-methyl chiral aldehydes and synthesis of the C(19)-C(29) segment of rifamycin S
Roush, William R.,Palkowitz, Alan D.,Ando, Kaori
, p. 6348 - 6359 (2007/10/02)
Double asymmetric reactions of the tartrate ester modified crotylboronates 1 and 2 and α-methyl chiral aldehydes are described. The reactions of the appropriate enantiomers of 1 and 2 with β-alkoxy-α-methylpropionaldehydes 11 provide adducts 12, 13, and 1
Chiral Synthesis via Organoboranes. 21. Allyl- and Crotylboration of α-Chiral Aldehydes with Diisopinocampheylboron as the Chiral Auxiliary
Brown, Herbert C.,Bhat, Krishna S.,Randad, Ramnarayan S.
, p. 1570 - 1576 (2007/10/02)
B-Allyldiisopinocampheylboranes have been screened for diastereofacial selectivity in their reaction with α-substituted chiral aldehydes.Both syn and anti products have been obtained in very high diastereoselectivities.Further, (E)-crotyldiisopinocampheylboranes and (Z)-crotyldiisopinocampheylboranes have been used for diastereofacial selectivity in their reaction with α-substituted chiral aldehydes.These crotylboranes, 20-23, are highly diastereoselective reagents and the corresponding (3,4- and 4,5-)-anti,syn, -anti,anti, and -syn,anti products have been obtained in very high facial selectivities; even the syn,syn product has been obtained in moderately good facial selectivity.Finally, the relative efficiences of the various chiral auxiliaries utilized in the literature for the allyl- and crotylboration have been compared with those achieved by the diisopinocampheylboron moiety.
