Primary (RPH2) and secondary phosphines (RRPH and R2PH) add to alkenes in presence of a strong base (e.g., KOH in DMSO).
Primarni (RPH2) i sekundarni fosfini (RRPH i R2PH) se dodaju u alkene u prisustvu jake baze (e.g., KOH u DMSO).