Brønsted acids (Chiral LBBAs) have been designed as new organocatalysts for biomimeticenantioselectivecyclization. A salt of a chiral phosphonous acid diester with FSO3H catalyzes the enantioselectivecyclization of 2-geranylphenols to give the desired trans-fused cyclized products with high diastereo- and enantioselectivities (up to 98:2 dr and 93% ee).