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the claim
NaBH4 reduces conjugated double bonds differently than LiAlH4 due to differing reducing strengths and Lewis acid effects
the verdict
INSUFFICIENT LEANING
refutedsupported
the weight of evidence
2 sources for · 0 against

Retrieved literature discusses reductions using NaBH4 and LiAlH4 individually or under modified conditions, but does not provide a direct comparative analysis establishing how differing reducing strengths and Lewis acid effects cause distinct outcomes for conjugated double bonds.

Evidence for · 2
β-DIALKYLAMINO CONJUGATED ENONES: REDUCTION WITH NaBH4–FeCl3 AND CONVERSION INTO CONJUGATED ENONES
1978 · cited by 11
Abstract β-Dialkylamino conjugated enones were reduced to the corresponding saturated γ-amino alcohols with sodium borohydride in the presence of iron (III) chloride. The resulting γ-amino alcohols were converted into conjugated enones by chromic acid oxidation and deamination.
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The analysis

rails:sufficiency:partial_only:for=0+2p:against=0+0p | v55:multi_partial_one_side:lean=lean_partial:for:one_sided

More for · 1
REDUCTION OF β-ALKYLTHIO α,β-UNSATURATED KETONES [R1COCH=C(R2)SR3] WITH LiAlH4 OR NaBH4: CONVERSION TO α,β-UNSATURATED KETONES (R1CH=CHCOR2)
1979 · cited by 9
Abstract Reduction of β-alkylthio α,β-unsaturated ketones [R1COCH=C(R2)SR3] with lithium aluminium hydride (LiAlH4) or sodium borohydride (NaBH4) gave α,β-unsaturated ketones (R1CH=CHCOR2) in moderate yields. In some cases, the saturated γ-hydroxy sulfide is obtained in high yield.
Everything we examined (2)
This check searched the claim as stated. It did not run a separate search for evidence against it.
  1. REDUCTION OF β-ALKYLTHIO α,β-UNSATURATED KETONES [R1COCH=C(R2)SR3] WITH LiAlH4 OR NaBH4: CONVERSION TO α,β-UNSATURATED KETONES (R1CH=CHCOR2)peer-reviewedno side taken
  2. β-DIALKYLAMINO CONJUGATED ENONES: REDUCTION WITH NaBH4–FeCl3 AND CONVERSION INTO CONJUGATED ENONESpeer-reviewedno side taken
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first checked01 Aug 2026
judged → INSUFFICIENT EVIDENCE · 001 Aug 2026
held for human review07 Aug 2026
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