Process for preparing para-t-alkyl thiophenols using bf3-h3po4 complex as catalyst

Claim 1

THE PROCESS OF SUBSTITUTING THE HYDROGEN ATOM IN THE PARA POSITION OF A THIOPHENOL BY A TERTIARY ALKYL GROUP AND OBTAINING SUBSTANTIALLY ALL C-ALKYLATE PRODUCT WHICH COMPRISES REACTING A THIOPHENOL CONTAINING HYDROGEN ATOMS IN META AND PARA POSITIONS WITH A T-ALKYL-GENERATING OLEFINIC HYDROCARBON CONTAINING FROM 4 TO 12 CARBON ATOMS, AND IN WHICH THE ALKYL SUBSTITUENT FORMED IS A TERTIARY ALKYL GROUP, EFFECTING SAID REACTION IN THE PRESENCE OF BORON TRIFLUORIDE-PHOSPHORIC ACID COMPLEX AS CATALYST SO THAT THE REACTION PRODUCT OBTAINED INCLUDES SUBSTANTIAL AMOUNTS OF PARA-C-ALKYLATE PRODUCT IN ADDITION TO S-ALKYLATE, AND REACTING AT LEAST A PORTION OF THE S-ALKYLATE PRODUCT IN THE PRESENCE OF SAID CATALYST WHEREIN REACTED S-ALKYLATE PRODUCT CONTAINING HYDROGEN ATOMS IN META AND PARA POSITIONS OF THE THIOPHENOL RING FORMS PARA-C-ALKYLATE PRODUCT.