Impact of L1-B rejection on H1-B

If L1-B visa of one goes rejected, does it impact processing of H1-B afterwards.

Is there any impact on H1-B visa processing if one has L1-B visa rejection history due to non-eligibility of specilised knowledge section?

Also, is there a minimum cooling period between applyinh L1-b and h1-b?

Please advice.

Did your L1 I-129 not get approved or did you get denied at visa stamping at the consulate?

Usually there is no impact unless they determine that you submitted false documents or false information. There is no official cooling period b/w the two visas.