157192-77-3Relevant academic research and scientific papers
New radical mediated polyolefin cyclisations directed towards steroid ring synthesis
Chen, Ligong,Bryon Gill,Pattenden, Gerald
, p. 2593 - 2596 (1994)
Treatment of appropriately substituted 5,9-diene, 5,9,13-triene and 5,9,13,17-tetraene phenoselenyl esters, e.g. 1a, 9 and 14, with Bu3SnH-AIBN is shown to lead to linear and angular six-ring fused polycycles, viz 2, 11 and 15 respectively, via
Consecutive 6-endo trigonal cyclisations from polyene acyl radical intermediates leading to decalone and perhydrophenanthrone ring constructions
Chen, Ligong,Gill, G. Bryon,Pattenden, Gerald,Simonian, Houri
, p. 31 - 44 (2007/10/03)
A range of substituted Se-phenyl 5,9-dieneselenoates, viz. 15a, 25, 26, 27, 42 and 52, have been synthesised and their reactions with Bu3SnH-AIBN investigated.The diene esters 15a, 42 and 52 are shown to lead to decalone and to perhydrophenanthrone derivatives, viz. 19, 43 and 53, respectively, via consecutive 6-endo trig modes of cyclisations starting from the corresponding 5,9-diene acyl radical intermediates.By contrast, the 5,9-dienoates 25 and 27 lacking alkyl substitution at C-9 instead underwent cyclisation to the indanones 36 and 37, respectively, and the 6-methyl substituted analogue 26 produced only the cyclopentanone 38 on treatment with Bu3SnH-AIBN.
