Regioselectivity of 1,1-dimethylallene allylboration: synthesis of isomeric 6- and 7-methylene-3-borabicyclo[3.3.1]nonanes
作者:Sergey Yu. Erdyakov、Mikhail E. Gurskii、Anatolii V. Ignatenko、Yurii N. Bubnov
DOI:10.1070/mc2004v014n06abeh002053
日期:2004.1
A dramatical difference in the stereoselectivity of 1,1-dimethylallene allylboration with allyl(chloro)- and triallylboranes has been revealed and applied to the synthesis of isomeric 7-methylene-6,6-dimethyl- and 6-(1-methylethylidene)-3-borabicyclo[3.3.1]-nonanes.
Syntheses of [6,6]-Fused-Ring 1,2-Azaborines
作者:Ahleah D. Rohr、Jeff W. Kampf、Arthur J. Ashe
DOI:10.1021/om401077k
日期:2014.3.10
BN-naphthalene (2) and BN-tetralin (7) have been prepared by a short synthesis from allyltributylstannane (3). The reaction of 3 with BCl3 followed by diallylamine and Et3N afforded (diallylamino)diallylborane (5), which gave 1,4,5,8-tetrahydro[1,2]azaborino[1,2-a][1,2]azaborine (6), on treatment with Grubbs (I) catalyst. The reaction of 6 with Pd gave 2 and 7. The reaction of 7 with Cr(CO)(6) gave the corresponding Cr(CO)(3) adduct 8, for which a crystal structure has been obtained. The isomerization of 6 to 7 has been examined using DFT calculations.